NYISO Winter Peak Analysis Implications to CLCPA

A new report prepared at the request of the New York Independent System Operator (NYISO) addresses issues associated with an electric system reliant on renewable energy sources during the winter.  This post compares these results with my previous work related to New York’s Climate Leadership and Community Protection Act (CLCPA) and discusses the implications on that law.

The Citizens Budget Commission developed an overview of the CLCPA targets in Green in Perspective: 6 Facts to Help New Yorkers Understand the Climate Leadership and Community Protection Act.  The goals of the law are truly aspirational:

Reduce greenhouse gas (GHG) emissions:

      • Reduce GHG emissions to 60 percent of 1990 emissions levels in 2030;
      • Generate zero GHG emissions from electricity production by 2040; and
      • Ensure GHG emissions are less than 15 percent of 1990 emissions levels in 2050, with offsets to reduce net emissions to zero.
      • GHG offsets means that for every ton emitted into the air one ton is removed via GHG capture of some sort. For example, a company or individual can pay a landowner to leave trees standing that would otherwise be removed or plant additional trees to offset GHG emissions.

Increase renewable electricity:

      • Increase renewable sources to 70 percent by 2030; and

Develop or support:

      • 9 gigawatts (GW) of offshore wind electric generation by 2035;
      • 6 GW of distributed photovoltaic solar generation by 2025; and
      • 3 GW of energy storage capacity by 2030.
      • Conserve 185 trillion British thermal units (TBTUs) of annual end-use energy use by 2025, of which at least 20 percent should be from energy efficiency improvements in disadvantaged communities.
      • The CLCPA also requires between 35 percent and 40 percent of spending on clean energy or efficiency programs be in disadvantaged communities and mandates an air monitoring program in at least four such communities.

I have evaluated winter peak impacts in previous posts on New York Resource Adequacy Proceeding Comments, Solar Issues in Upstate New York , CLCPA Solar and Wind Capacity Requirements and CLCPA Energy Storage Requirements.  My primary concern is the requirement to generate zero GHG emissions from electricity sector production by 2040 coupled with the increased load needed to electrify the heating and transportation sectors enough to meet the 85% reduction by 2050 target.

Fuel and Energy Security In New York State Report

NYISO  had the Analysis Group do a forward-looking assessment of the fuel and energy security of the New York electric grid during winter operations.  The November 2019 final report was titled: Fuel and Energy Security In New York State: An Assessment of Winter Operational Risks for a Power System in Transition.  The objective was to assess winter fuel and energy security risks and identify key factors that would affect risks. Specifically, the study targeted potential reliability risks and impacts under severe winter conditions and adverse circumstances regarding system resources, physical disruptions, and fuel availability.  Importantly it is a snapshot of the winter of 2023-2024 before the CLCPA renewable energy and electrification of other sectors implementation really kicks in

Previously I have analyzed the effect of winter peaks and I chose 12/29/17 to 1/12/2018, a period that is included in their analysis.  The Analysis Group defined extreme weather events including the largest increase above average daily load over a long period as 14 days from 12/25/2017 to 1/8/2018 and more extreme shorter periods where they found in the last 25 years the fourth lowest 3-day cold snap was 1/4/2018 to 1/7/2018.  Then they evaluated different scenarios that included different combinations of “(a) timeframe for the development of new renewable resources; (b) capacity imports from neighboring regions; (c) potential retirement of units affected by the peaker rule; and (d) availability of natural gas for power generation”. The evaluation determined where these scenarios might cause problems.

The analysis included the following relevant conclusions (two key points underlined by my emphasis):

    • With the continued operation and availability of most of the assets currently expected to be in place in the winter of 2023/2024, the NY grid contains sufficient diversity and depth of fuel supply to support reliable winter operations. This result is consistent with the historical operating experience in recent past winters, including during severe weather conditions.
    • Meeting the state’s renewable and clean energy goals can provide valuable reliability support, and may be particularly true with respect to offshore wind. Delayed realization of renewable resource additions (as compared to the 2017 CARIS Phase 1, System Resource Shift case levels that are assumed under initial conditions) can lead to potential LOL events that would not otherwise occur when combined with other adverse system conditions. The potential magnitude and pace of change to the resource fleet stemming from requirements under the CLCPA may be of far greater importance for evaluation than the considerations, scenarios and physical disruptions evaluated in this fuel and energy security study with respect to winter operational risks.
    • The availability and contributions of adequate levels of natural gas-fired and oil-fired (or dual fuel) generating resources is necessary to maintain power system reliability in cold winter conditions in the near-term. This is particularly true for Long Island and New York City. Simply put, avoidance of potential loss of load events in these load centers, under plausible adverse winter conditions, requires operation of natural gas and oil-fired units. Reduction in the generation available from such resources – whether through capacity retirements, low initial oil inventories, reduction in natural gas availability for power generation, or interruptions in the ability to refuel oil tanks throughout the winter represents the most challenging circumstances for reliable winter system operations in New York over the coming years.

Implications for CLCPA

The analysis notes that the “potential magnitude and pace of change to the resource fleet stemming from requirements under the CLCPA may be of far greater importance for evaluation than the considerations, scenarios and physical disruptions evaluated in this fuel and energy security study with respect to winter operational risks”.  I agree because I believe that it is absolutely necessary for the State to prove that when the energy load increases when other sectors are electrified that fuel and energy security can be maintained without using fossil fuels.

The analysis also states that “Simply put, avoidance of potential loss of load events in these load centers, under plausible adverse winter conditions, requires operation of natural gas and oil-fired units”.  The CLCPA requirement that all electric energy must come from non-fossil fired sources in 2040 is an extraordinarily difficult goal to meet.  The political calculus to include this in legislation was not backed up by any analysis.  The state has to show how this can be done as soon as possible lest New York resources be squandered on an impossible quest.  As I show below, the actual renewable resource may not support this target because of logistical issues and even if it does there may be immense costs.

Need for Renewable Energy Resource Analysis

In my back of the envelope analysis of the summer peak energy storage requirements I used actual wind speed data to estimate the New York off-shore wind resource.  New York State awarded the first two contracts for off-shore wind projects in July 2019.  The Equinor 816 MW winning project press release said “The project is expected to be developed with 60-80 wind turbines, with an installed capacity of more than 10 MW each”.  Among the many details redacted in the public version of their proposal was specific information on the proposed wind turbines.  The public version included a diagram of the proposed wind turbine size as compared to the Chrysler building and showed that top tip of the blade at 250 m.  I estimated the hub height to be 173 m by scaling the drawing.  In this analysis I characterized wind energy output as a function of observed wind as follows.   I found a wind turbine power output variation curve that had a cut-in speed of 3.5 m/s and a cut-out wind speed of 25 m/s. Using that wind variation curve, I estimated that output of each 10.2 MW wind turbine will equal 0.971 times the wind speed minus 3.4.

For the input meteorological data, I found a National Oceanic and Atmospheric Administration buoy located 30 nautical miles south of Islip, NY (40°15’3″ N 73°9’52” W) that I used to represent NY offshore wind resource availability. The observed wind speed at the hub height is proportional to the logarithm of the height above ground.  For that calculation I assumed a hub height of 173 m and a surface roughness of 0.0003 using the buoy anemometer height of 4.9 m. I downloaded hourly NDBC data for 2018 and 2017 and calculated the wind energy output for every hour in the period 12/25/2017 to 1/8/2018 using that relationship and the wind turbine output variation equation I derived.

The key finding is that there were two no wind energy output periods on 3-4 January 2018 during an intense cold snap when electric load is high as shown in the New York Off-Shore Wind Generation Estimate for 9000 MW CLCPA Off-Shore Target table.  I was surprised to see that the wind resource went to zero during a high load period not only when the winds were light on January 3 but also when a deep low pressure developed and the wind speeds exceeded 25 m/s on the very next day.  The wind generation estimate table lists the output from a single 10.2 MW wind turbine, 80 turbines in the Equinor proposed wind facility and for all 9,000 MW of Cuomo’s CLCPA target of 9,000 MW of off-shore wind.  It is important to note that adding even more wind turbines still does not preclude the need for substantial energy storage.  While all the New York off-shore wind resource may not go to zero simultaneously that resource is going to be highly correlated across the available area so they all will track closely.


Every time I look at the meteorological data relative to the winter peak I get a surprise.  I expected that the winter observed peak load would occur during very cold weather associated with a slowly moving high pressure system that originated in the cold northern plains large enough to cover the entire northeastern US.  The resulting multi-day period of clear skies, light winds, and inherent cold temperatures would result in very high energy demand for heating.  The early January 2018 high load period was very different.  Weather maps for this period show (January 2018 Weather Maps) a relatively small high pressure system in the central US on January 2 that moved east ahead of a storm system on January 3.  The high pressure was strong enough over the New York offshore wind region that winds were less than 3.5 m/s for five hours on January 3.  However, the storm system moved eastward and re-developed into a strong storm just off the coast on January 4 with an eleven-hour period of greater than 25 m/s wind speed 13 hours after the light wind period ended.  By January 5 the storm had raced northeast to the Canadian Maritimes but was pumping cold air back across New York State.

This period must be analyzed in more detail by New York State to determine whether the CLCPA requirements endanger fuel and energy security.  If the assumptions I used for no wind power due to light winds and strong winds are correct then there will be 16 hours of no wind power in a 29-hour period during the coldest extended duration cold weather event that the Analysis Group identified after analyzing 25 years of data.  Furthermore, it also overlaps fourth worst 3-day cold snap.  The State needs to estimate what the future load will be when the home heating and transportation sectors are electrified to meet the CLCPA emission reduction goal and then assess whether renewable resources will be adequate during the entire extended duration period using the proprietary energy output information in the renewable energy proposals submitted to the State not only in the NYSERDA off-shore wind program but also the Article Ten applications.  This analysis has to be done for the entire state and obviously will lead to an estimate of the amount of energy storage necessary in 2040 when no electric energy from fossil-fired facilities is allowed.  It is not clear to me if there is enough space available where it is needed to site all the renewable and energy storage necessary.  Even if there is enough space, this analysis will provide the information needed to estimate how much all this will cost.

Frankly, it is laughable that the New York State legislature and Governor Cuomo enacted a law mandating specific energy and emission reduction goals without doing such an analysis first.  I believe it is time for the energy professionals in the State to step up and demand such an analysis before the State squanders money on a system design that can only be implemented with massive wind, solar and energy storage development.  Even if this system could be developed it will surely be expensive.  Just how much is anyone’s guess until such a study is completed.

CLCPA Renewables Needed for Doubled Electric Load

The Brattle Group recently released a report entitled “Achieving New England’s Ambitious 2050 Greenhouse Gas Reduction Goals Will Require Keeping the Foot on the Clean Energy Deployment Accelerator”.  The primary emphasis of this blog is on New York environmental and energy policy issues so this post applies their renewables needed estimate to the New York’s Climate Leadership and Community Protection Act (CLCPA) requirements.

In particular, the Brattle report notes that in order to reduce greenhouse gas emissions from the whole economy it will be necessary to electrify transportation and heating which will increase electric load.  They estimate that in order to meet New England’s goal of an 80% reduction by 2050 that electricity demand could be “twice the current level by 2050”.   I have yet to see any New York agency estimate of future load for the CLCPA so I decided to try to estimate how much renewable energy would be needed if New York electric load doubles by 2040 at the same time that New York electric load is supposed to eliminate fossil-fired generation.  I used that estimate to estimate how much renewable energy capacity (MW) in the form of on-shore wind, off-shore wind and solar could be needed in New York in 2040.  I determined how much power (MWh) was used in 2018, doubled that, and then guessed how the necessary capacity could be distributed between on-shore wind, off-shore wind and utility solar.

Brattle Key Findings

The Brattle Group prepared their report on behalf of the Coalition for Community Solar Access.  According to the news release there were several key findings:

      • Electricity will play a critical role in decarbonizing the New England economy. As a result, electricity demand will grow substantially and could well be twice the current level by 2050.
      • In supplying this growing demand for power, both solar photovoltaic (PV) and offshore wind will likely play a critical role.
      • Merely maintaining the current rate of clean energy resource deployment will cause the region to fall short of its targets. Currently planned clean energy resource generation for 2019–2030 in New England amounts to approximately 830 MW per year. This represents a significant increase from the historical generation of 280 MW per year from 2010–2018.
      • However, to achieve the 2050 targets, New England will need to accelerate clean energy resource additions to between 4 and 7 GW per year on average between 2021 and 2050.
      • To reach these levels, annual clean energy resource additions will need to continue to grow by approximately 9% per year through 2050.


The first step is to determine how much generation was used in 2018.  I used the 2019 NYISO  Load & Capacity Report “Gold Book” Summary of Table III-3c 2018 Annual Net Energy Generation by Zone and Type to estimate 2018 energy generation by generator type and I have included a consolidated summary of data by fuel type.  Note that fossil fuel accounted for 41.9% of the generation in 2018.  Total load was 135,585 GWh so a 2040 doubled load will equal 271,170 GWh.

Estimating the feasibility for future development scenarios is difficult.  The Projected Net Energy Generation in 2040 table lists the assumptions I made to determine how New York generation could meet the doubled load.  There are three main components of the response: expand output from pumped storage and conventional hydro, maintain nuclear, and expand renewable combustion (landfill gas and municipal waste incineration); reduce load through energy efficiency, tighter codes & standards, behind-the meter (BTM) distributed solar and BTM non-solar distributed generation; and utility scale on-shore wind, off-shore wind and solar.

In the first component I estimated future generation as a function of fuel type.  The CLCPA law requires that all fossil-fired electric generation be replaced by 2040 so I zeroed out potential generation in those categories.  Although I have seen claims that additional hydro generation can be developed, I doubt that those resources could ever exceed a 10% increase over current levels.  In 2040 I estimated that only Nine Mile 2 nuclear would be operating because all the other nuclear generating stations would be over 60 years old.  The renewable combustion category includes internal combustion from landfill gas as well as wood and refuse fired steam generators.  I assumed that those resources could only increase 10% over current levels.  The result is that Component 1 can only cover 18.4% of the estimated load.

Reducing energy use through energy efficiency, improvements in codes and standards for energy use, behind the meter solar, and behind the meter non-solar distributed generation will reduce the amount of energy needed in Component 2.  Table I-b: Summary of NYCA Annual Energy Forecasts in the Gold Book lists GWh projections for these categories in 2040. The Gold book also includes tables that provide the net energy and the estimated capacity for each of these categories.  Since the publication of the 2019 Gold Book, the distributed solar deployment target was increased to 6,000 megawatts by 2025, up from 3,000 megawatts by 2023.  I adjusted my projection for that by assuming 6,000 MW in 2025, that observed energy per capacity would remain the same and that the annual increase after 2025 would be the same as the Gold Book projection.  Instead of 5,928 GWh from 4,525 MW of distributed BTM solar I estimate 9,847 GWh from 7,517 MW in 2040. The result is that Component 2 can only cover 13.6% of the estimated load.

The last component of the expected load is utility-scale wind and solar. On the basis of the assumptions for components 1 and 2, these resources will have to provide 68% of the load or 184,285 GWh.  In my opinion, this requirement will lead to a large increase in imported generation but if we assume that is not the case, this will require a massive buildout of large renewables.  In round numbers this buildout will require development of 9,214 GWh of generation output per year as shown in the Projected Renewable Energy Resources Needed to Meet Doubled Annual Electric Load in 2040 table.

In order to determine how much capacity will have to be developed to generate that much energy capacity factors have to be used.  In 2018, 1,739 MW of on-shore wind produced 3,985 GWh of net energy and 32 MW of utility solar produced 49 GWh of net energy.  Those observed values can be used to determine an on-shore wind capacity factor of 26% and a utility solar capacity factor of 17%.  I assumed those capacity factors for 2040.  Off-shore wind capacity will be developed by 2040 and I assumed a capacity factor of 50% based on the NYSERDA assumption for its recent awards. Using those capacity factors, I arbitrarily picked an annual development rate to meet the 9,214 GWh annual rate target.  I calculated that 1,050 MW of on-shore wind, 1,500 MW of utility solar and 1,050 MW of off-shore wind which will generate 9,293 GWh additional energy per year which exceeds the target development rate.

Sanity Check

One question is whether my arbitrary future renewable energy choices are reasonable.  I compare those numbers to an earlier wind analysis and NYS announced projects below.

The National Renewable Energy Laboratory sponsored the Eastern Wind Integration and Transmission Study (EWITS) and that report includes an estimate of future NY wind requirements.  The study was designed to examine the operational impact of up to 20% to 30% wind energy penetration on the bulk power system in the Eastern Interconnection of the United States. It included development of a database of wind resource and plant output data for the eastern United States.  One of the scenarios modeled 30% penetration of wind energy into the total energy consumed.  The scenario was labeled “Aggressive On- and Offshore” and required “a substantial amount of the higher quality wind resource in the NREL database” and noted that a “large amount of offshore generation is needed to reach the target energy level”.  The total wind capacity projected for the New York State Independent System Operator to meet a 30% penetration level was 23,167 MW of on-shore wind and 9,280 MW of off-shore wind.  The total on-shore wind capacity projected for the arbitrary choice is 20,000 MW and that compares well with the EWITS value, but the arbitrary choice for total off-shore wind is 23,000 MW more than double the EWITS value.

Another sanity check is to compare the annual generation development predicted with the queue of New York Projects.  In New York all utility scale projects over 25 MW are required to go through an Article 10 review process.  As part of that process all the projects in the review queue are tracked.  The New York State Department of Public Service Article Ten Project Queue table lists the MW capacity for projects summed by technology proposed categories and the year the permitting process began.  In the best year 1,478 MW if wind projects started permitting and in 2019 to date there have been 3,193 MW of solar and solar plus storage projects have started permitting.  Therefore, it appears that my guess that 1,050 MW of on-shore wind and 1,500 MW of utility solar development per year is possible.


The Brattle estimate for the additional energy needed to power all the electrification necessary to reduce CO2 emissions in New England by 80% is double the current load.  Thus, when New York State gets around to proposing how much energy might be necessary for the CLCPA, it is not unreasonable to expect that it will be at least two times the current amount.

At some point the intermittent and diffuse nature of renewables will have to be addressed.  Because renewables are intermittent, storage to cover light winds and low solar irradiance will be required.  Because they are diffuse transmission links to move the power as needed are also required.  As a result, the renewable generating facilities will not only have to replace existing fossil-fired dispatchable load but also provide support to the transmission system that is currently provided by those facilities.  I believe that will add to the amount of renewables needed.

When New York State gets around to proposing how much energy might be necessary for the CLCPA, it is not unreasonable to expect that it will be at least two times the current amount.  The wild guess estimate of the renewable capacity does not appear to exceed any feasibility threshold but there are some caveats.  For all components of the proposed response the problem of diminished returns on investment cannot be dismissed.  For example, it is not unreasonable to expect that the best on-shore wind development sites will be developed first and may in fact be already developed.  Consequently, later developments are going to have to go to sites with a lower potential wind resource so the capacity factor for future developments will be reduced.  The same problem should be expected for distributed solar, utility solar, and energy efficiency investments.

There are other issues of course.  First, and foremost, is cost.  There are also logistical issues developing this much renewable energy over this time frame.  Finally, note that given that the expected lifetime of these renewable projects is on the order of 20 to 25 years, there will be an eventual de-commissioning and re-development steady-state of constant investments required forever in the future.

Hay Harvest Climate Trend?

At a recent meeting I ran into Lois New who, before she retired, was the Director of the New York Department of Environmental Conservation’s Office of Climate Change.  I have known her for years and we worked together during RGGI stakeholder meetings. During our conversation she mentioned that her neighboring farmers were seeing the effects of climate change because they were having more trouble getting hay in before winter.  I said I thought it was more likely weather, she disagreed, and that ended the conversation.  This post looks at data to see if there is, in fact, a climatic trend for worse weather for haying.

First, let’s define weather and climate.  According to the National Oceanic and Atmospheric Administration’s National Ocean Service “Weather reflects short-term conditions of the atmosphere while climate is the average daily weather for an extended period of time at a certain location.”  The referenced article goes on to explain “Climate is what you expect, weather is what you get.”

New York State policy is all in that there is an imminent and inevitable climate change catastrophe that can only be averted if we do something.  In this case New York’s version of doing something is the Climate Leadership and Community Protection Act (CLCPA) which was enacted last summer.  It is described as “the most ambitious and comprehensive climate and clean energy legislation in the country”.  When Governor Cuomo signed the bill he said:

“The environment and climate change are the most critically important policy priorities we face.  They literally will determine the future – or the lack thereof. Even in today’s chaos of political pandering and hyperbole there are still facts, data and evidence – and climate change is an undeniable scientific fact.”

In order to rationalize these statements Governor Cuomo has a long history of attributing any observed unusual or extreme weather to climate change’s effects being seen today.

Paul Homewood at the Not a Lot of People Know That web page authored a couple of recent articles slamming NY Governor Cuomo for a couple of examples. The first article points out that his statement that “we did not use to have hurricanes, we did not have super storms, we did not have tornadoes” is dead wrong.  The second article entitled “Cuomo’s Fake Claims About Extreme Rainfall” noted that Cuomo implied in an MSNBC interview (referenced in the blog post) that extreme rainfall was getting much worse in NY State.  However, Homewood showed that “there is absolutely no evidence of that at all” at the long running Ithaca station or a New York City station.

As a member of the Governor’s inner climate circle Ms. New must have been a part of the public relations campaign justifying the CLCPA.  Her claim that farmers cannot complete harvesting hay because of climate change is entirely consistent.  This post will look at the facts, data, and evidence that there is a climate effect on haying.   Homewood referenced a link to precipitation data at http://climod2.nrcc.cornell.edu/ which is what I needed to do this analysis.


According to Mother Earth News in a Guide to Growing, Harvesting and Baling Hay “there are three steps involved in turning a green crop into what can rightfully be called hay:

      1. Cutting (followed by partial drying.)
      2. Windrowing (followed by further drying.)
      3. Baling hay or stacking hay.”

For our purposes the key is that freshly cut hay has to be dried because if hay is tied into tight bales when it still contains moisture it will go through a curing process that creates heat which can lead to self-combustion.  Therefore, farmers do not want to bale their cut crop until the moisture is less than 20%.  To do that the cut grass is allowed to dry for up to several days, then raked into rows and allowed to dry out most of the moisture.  Once dry then the hay can be baled.

The Northeast Regional Climate Center data sets provide processed values for temperature and precipitation for many observing sites in New York.  I chose to look at two stations with long records: Ithaca (1894-2019) and Mohonk House (1896-2019 with 1899 missing).  I downloaded the daily maximum, minimum, and average temperatures, precipitation amount, snowfall amount, snow depth and growing degree days.  A growing degree is the difference between average temperature in deg F and 50.  For example, if the average daily temperature is 60 deg F then there are ten daily growing degree days for that date.

I assumed that in order to harvest hay that the farmer would need to have at least four days when there was no precipitation greater than 0.05”.  Whenever that threshold was reached or exceeded the Harvest-Day parameter was set to one.  The total number of days that met this criterion in each month was summed along with the number of growing degree days per month for the growing season that I set as May through October.

I did a simple analysis of the two data sets.  I calculated the growing degrees and number of harvest days for each month in the growing season that I defined as May 1 to October 31.  I summed these values for the whole growing season.  I also summed values for the fall hay harvest season that I defined as August and September.  I fit a linear regression model to describe the relationship between growing degree days and hay harvest days by year for the whole growing season and just August and September. I use Statgraphics Centurion software from StatPoint Technologies, Inc. to do my statistical analyses because it enables the user to choose the best relationship from 27 different linear regression equations.  I determine which linear regression model provides the best fit and then use that model to describe the data. If the calculated probability value (P-value) is less than 0.05, there is a statistically significant relationship at the 95.0% confidence level and I defined the test result as significant. In addition, I calculated simple statistics to describe the two data sets.


The purpose of this analysis is to evaluate the claim that farmers are having more trouble getting their hay harvested because of climate change.  If that were in fact the case then we would primarily expect to see a trend in decreasing hay harvest days and to a lesser extent a decrease in the number of growing degree days.  The linear regression statistical results for two sites over the entire growing season and August and September were evaluated.  Overall eight tests were done with the following results:

Mohonk Growing Season hay-harvesting days

      • Insignificant reduction in the number of hay-harvesting days over the growing season

Mohonk Growing Season growing degree days

      • Significant increase in the number of growing degree days over the growing season

Mohonk August and September hay-harvesting days

      • Significant increase in the number of hay-harvesting days in August and September

Mohonk August and September growing degree days

      • Significant increase in the number of growing degree days in August and September

Ithaca Growing Season hay-harvest days

      • Significant reduction in number of hay-harvesting days over the growing season

Ithaca Growing Season growing degree days

      • Significant reduction in growing degree days over the growing season

Ithaca August and September hay-harvest days

      • Insignificant reduction in number of hay-harvesting days in August and September

Ithaca August and September growing degree days

      • Significant reduction in growing degree days in August and September

Of the eight tests: three were consistent with the hypothesis that getting hay harvested is getting more difficult because hay-harvesting days and growing degree days decreased, three were inconsistent with the hypothesis because hay-harvesting days and growing degree days increased, and two tests were statistically insignificant.  Note that if growing degree days are going down that is an indication that temperatures are cooling and not warming.

Another way to look at the climate change impact is to statistically evaluate the data.  The Ithaca Hay Season Climatological Normal and Last 30 Year Dataand the Mohonk House Hay Season Climatological Normal and Last 30 Year Data tables include climatological normal data, the last 30 years of data, and summary statistics.

I believe that one way to check climate change claim effects is to check the 30-year average from the beginning of the period of record with the 30-year average at the end of the period of record.  I also believe that there are multi-year weather cycles of differing lengths and if that is the case then arbitrarily picking these two periods may not be representative.  Therefore, consider this comparison with caution. At Mohonk House the growing season hay harvesting days decreased by two days but the August and September days increase by three days.  The Ithaca growing season hay harvesting days decrease by five days but the August and September days stayed the same.

Importantly, these data also indicate that there is a lot of inter-annual variation in hay harvesting days.  The standard deviation of the August and September data at Ithaca was 6, the minimum was 2 and the maximum was 28. At Mohonk House the standard deviation was 8, the minimum was 0 and the maximum was 43.  The difference between the first 30-years and the last 30-years is less than the standard deviation variation.  Therefore, I don’t think it is reasonable for anyone to claim that they can discern a climatic trend.

So why is there an impression that hay harvesting is getting worse?  A quick review of the last 30 years of data indicates to me that this impression is consistent with weather variations.  At Mohonk House in 2014 and 2015 there were a couple of years that were great for hay harvesting with half the days (31) in August and September suitable.  Jump forward to the last two years and there were only 11 and 12 days suitable.  In that short time frame of reference an alarming trend is evident.  However, also recall that the average number of hay harvesting days is 18 and with a standard deviation of 8.  So even though  2018 and 2019 data suggest there may be a problem, the data are within one standard deviation of the mean which means that they are well within natural variation observed since 1896.


The points that I want readers to remember are that climate numerical analysis results are likely ambiguous, picking a climatic trend out of weather records is not simple, and, most importantly, any statistically significant trends are likely smaller than the observed inter-annual variation.   As a result, anecdotal claims of observed changes of weather parameters due to climate change are likely biased and unsubstantiated.

This data analysis shows ambiguous results.  It suggests that there is conflicting support for a climate-change induced problem with hay harvesting in August and September.  Mohonk House data indicate a statistically significant trend in more days suitable for harvesting hay whereas Ithaca data indicate a trend towards less days suitable for harvesting hay but the trend is insignificant.  At both stations there is a negative statistically significant trend in the number of growing degree days.  Depending upon your intent, statistics can “prove” an argument that there is a problem or there isn’t a problem.

In order to do a comprehensive analysis to settle the question would take a lot of work.  Before doing any more analysis work, the evaluation data used should be confirmed as appropriate.  In order to represent the New York region adequately, stations across New York and the region would all have to be analyzed similarly.  It might also be appropriate to look at each month when haying is done.

I think the comparison of possible trends against inter-annual variation is illuminating.  If there is a climate change signal the difference between the first thirty years of the records with the last thirty years should show changes.  What differences that do exist are smaller than the observed variations.  All changes are less than one standard deviation from the mean.  I believe that this is a consistent problem for lines of the so-called evidence for climate change impacts observed in New York.

Based on this analysis I believe that anecdotal claims of observed changes of problems with hay weather parameters due to climate change are likely biased and unsupported by the data.  The variations noted and ascribed to climate change are in fact due to weather.

I also think that similar analyses of other claims would provide similar results.  The Governor’s claim “Even in today’s chaos of political pandering and hyperbole there are still facts, data and evidence – and climate change is an undeniable scientific fact” and his tendency to blame any unusual weather on climate change are not supported by this analysis.  In my opinion, careful evaluation of data and evidence for most of his claims would find similarly ambiguous and less certain results.

RGGI Lessons to Date – November 2019 Edition

I recently had a simple version of this RGGI article published at Whats Up with That .  This article provides more details and considers other issues with the Regional Greenhouse Gas Initiative (RGGI).  The program is ten years old and has been touted as a successful example of a “cap and dividend” pollution control program and now it is being proposed as the model for a similar control program in the Transportation Control Initiative (TCI).  This post looks at the numbers to see if this praise is warranted and whether RGGI is a good model for the proposed TCI.  Ultimately the question is whether any cap and trade program for carbon dioxide (CO2) can be successful.

I have been involved in the RGGI program process since its inception.  I blog about the details of the RGGI program because very few seem to want to provide any criticisms of the program. I have extensive experience with air pollution control theory and implementation having worked every cap and trade program affecting electric generating facilities in New York including the Acid Rain Program, Regional Greenhouse Gas Initiative (RGGI) and several Nitrogen Oxide programs.  Note that my experience is exclusively on the industry side and the difference in perspective between affected sources trying to comply with the rules and economists opining about what they should be doing have important ramifications.  The opinions expressed in this post do not reflect the position of any of my previous employers or any other company I have been associated with, these comments are mine alone.


RGGI is a market-based program to reduce greenhouse gas emissions. It is a cooperative effort among the states of Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New York, Rhode Island, and Vermont to cap and reduce CO2 emissions from the power sector.  According to a RGGI website: “The RGGI states issue CO2 allowances which are distributed almost entirely through regional auctions, resulting in proceeds for reinvestment in strategic energy and consumer programs. Programs funded with RGGI investments have spanned a wide range of consumers, providing benefits and improvements to private homes, local businesses, multi-family housing, industrial facilities, community buildings, retail customers, and more.”

The RGGI states developed a cap during a long stakeholder process that was based on historical operations and emissions.  The cap is the regional budget for CO2 emissions.  The Nine-State RGGI Region Emissions, Original RGGI Cap, and the Adjusted RGGI Cap table lists observed emissions and two caps.  The original cap was developed before the fracking revolution changed the cost of natural gas such that it became significantly cheaper than coal and residual oil.  After natural gas prices dropped so much the original projections for emissions were so out of tune to what was happening the RGGI states developed an adjusted cap to account for that development.

In order to determine if RGGI is successful and a program to emulate let’s define some metrics.  The primary goal of the program is to reduce greenhouse gas emissions (GHG) from the electric generation sector so quantifying the emissions change from before the program to the present is a key metric.  Another appropriate metric is cost efficiency per ton of CO2 reduced compared to the Social Cost of Carbon (SCC).  This parameter is an estimate of the economic damages from emitting a ton of CO2 and is widely used to justify GHG programs.  For a comparison metric I will ignore issues with this parameter even though I agree with the following by Paul Driessen and Roger Bezdek: “The SCC assumes fossil-fuel-driven carbon dioxide emissions are causing dangerous manmade climate change, and blames U.S. emissions for every conceivable climate-related cost worldwide. But it fails even to mention, much less analyze, the tremendous and obvious benefits of using oil, gas and coal to power modern civilization.”

In addition to these metrics we have to look at lessons learned and considerations that are not yet resolved to determine whether RGGI is a good model for future control programs.  I address the following: the theory and reality of historical trading programs, control options for affected sources, allowance management, allowance ownership and allowance costs.  Most of these issues were not discussed in the What’s Up with That post.

Theory and Practice

I agree with the argument that economic incentives or market trading programs reduced emissions more cost-effectively than a command and control program.  However, it is instructive to look at the reasons why emission reductions occurred because the theory does not necessarily drive the observed reductions.  It is necessary to review historical performance of RGGI to determine why CO2 emissions reductions have occurred so we can reasonably expect a similar result in other applications like the TCI..

Let me first point out that there is a fundamental difference between the way affected sources operate in emissions trading markets and the way economic theory predicts they should operate.  I believe that electric generating affected source allowance management is different than theory because the affected sources do not treat allowances as a storable commodity or a financial asset in the usual sense of the term.  Instead allowance management is overwhelmingly driven by regulatory requirements for the current compliance period. i.e., do I have enough allowances to cover expected emissions?  Financially it is simply another cost of operating and not a potential profit center.  The important difference is that the academic economic theory holds that affected sources are looking years into the future, but in reality, there is no such long-term time horizon for affected sources.  Their decision on the quantity of allowances to buy is driven by their expected operations in the period between auctions and, at most, the entire compliance period.  Also note that most companies include a small margin for operational variations and regulatory compliance considerations. Because of the differences between the way affected sources operate and the way economic theory says they should operate, I have little faith in the models that predict future allowance margins.

The Acid Rain Program (ARP) was undoubtedly a successful program because it lowered emissions more than expected at far lower costs than predicted.  This program was open and transparent so all emissions and allowance data are available.  In order to meet the initial emission cap target of a 50% reduction, affected sources were awarded half of their historical emissions.  Although it is common practice to vilify this program for giving away the allowances for free the rationale is still valid today. The concept for the acid rain program was that power plants would install SO2 control equipment and if they over-controlled their emissions, they could sell the excess allowances earned to other facilities that could not install the control equipment as cost-effectively.  This approach incentivizes over-control because affect sources can subsidize control equipment investments they made by selling excess allowances.  This cost reduction efficiency brings down overall costs.   It turned out that fuel switching and technological improvements were so effective that far greater than expected reductions occurred.  Fuel switching occurred because technology to burn lower sulfur coal was developed and railroad de-regulation opened the market to transporting coal cost-effectively over very long distances. Another subtle point is that the ARP allowance bank was earned, that is to say excess allowances in the bank represent over-controlling emissions lower than the cap limits.

The Regional Greenhouse Gas Initiative (RGG) is a cap-and-invest program that has been touted as a model for a TCI cap-and-invest trading program because of its “success”.  Although the RGGI states claim that the program is open and transparent the fact is that there is no allowance ownership information available.  There is no question that CO2 emissions have come down in the RGGI states since the inception of the program but it is important to determine why they have come down.  I will address that point later on.  There is a fundamental difference in the way that affected sources treated RGGI as opposed to ARP, namely ARP was considered a control program and RGGI was considered a tax.  Because there are no cost-effective add-on controls for CO2 at existing power plants there are limited options to meet the cap.  Because allowances all have to be purchased and the incremental cost was low plant control programs to reduce CO2 through efficiency were not implemented.  The allowance bank does not represent earned reductions below the cap limits.  Instead the bank is made up of allowances purchased at auctions and on the market.  The RGGI states in their program reviews were very concerned that the allowance bank was large and have taken steps to adjust the allowances sold at auction to force the bank smaller.  In the naïve belief that RGGI investments significantly reduced emissions the RGGI states have also reduced the cap going forward.  As a result. RGGI going forward is going to be significantly different that RGGI in the past and that has ramification on its value as a model for TCI or any other future emissions trading program.

I noted above the distinction between the ARP “earned” allowance bank and the RGGI allowance bank.  Because the ARP affected sources over-controlled emissions below their cap levels, they earned the allowance bank.  That means the bank represents surplus allowances that are not needed for compliance so it does not matter who owns them.  On the other hand, all RGGI allowances were purchased at one time or another by anyone who offered a high enough price at an auction or on the market.  Because allowance ownership is not transparent, we only know the number of allowances owned in the following three categories:

      • Compliance-oriented entities are compliance entities that appear to acquire and hold allowances primarily to satisfy their compliance obligations.
      • Investors with Compliance Obligations are firms that have compliance obligations but which hold a number of allowances that exceeds their estimated compliance obligations by a margin suggesting they also buy for re-sale or some other investment purpose. These firms often transfer significant quantities of allowances to unaffiliated firms.
      • Investors without Compliance Obligations are firms without any compliance obligations.

To this point in 2019 the affected sources with compliance obligations have been able to get the allowances needed to cover their emissions from auctions and the market.  However, at some point going forward this will change and it will make a difference.  I have addressed the status of RGGI emissions and allowances elsewhere but briefly because the allowance cap is being reduced so much, the affected sources are going to have to go to the investors without compliance obligations.  This is uncharted territory and, at a minimum, I expect that the allowance prices will spike upwards.  Note that this price spike provides no dividends for CO2 reduction investments because the dividends are earned at the initial sale.  But it could be even worse if the entities without compliance obligations withhold allowances and create a shortage such that affected sources do not have enough allowances to run.

RGGI supporters who claim it is successful point to emission reductions of 40 to 50%.  In order to evaluate the RGGI emissions reduction claims I used data from the Environmental Protection Agency Clean Air Markets Division air markets program website.  Emissions data from the electric generating unit (EGU) sector are available from before RGGI started to the present, so I downloaded all the EGU data for the nine states currently in RGGI from 2006 until 2018.  In order to establish a baseline, I calculated the average of three years before the program started.  As shown in the RGGI Nine-State EPA CAMD Annual CO2 Emissions table the total emissions have decreased from over 127 million tons prior to the program to just under 75 million tons in 2018, for over a 40% decrease.  Note that these numbers are slightly different than the previous table because different sets of sources are used.

However, when you evaluate emissions by the primary fuel type burned it is obvious that emissions reductions from coal and oil generating are the primary reason why the emissions decreased.  Note that both coal and oil emissions have dropped over 80% since the baseline.  Natural gas increased but not nearly as much.  I believe that the fuel switch from coal and oil to natural gas occurred because natural gas was the cheaper fuel and had very little to do with RGGI because the CO2 allowance cost adder to the plant’s operating costs was relatively small.   There is no evidence that any affected source in RGGI installed add-on controls to reduce their CO2 emissions.  The only other option at a power plant is to become more efficient and burn less fuel.  However, because fuel costs are the biggest driver for operational costs that means efficiency projects to reduce fuel use means have always been considered by these sources.   Because the cost adder of the RGGI carbon price was relatively small I do not believe that any affected source installed an efficiency project as part of its RGGI compliance strategy.

As a result, the only reductions from RGGI that can be traced to the program are the reductions that result from direct investments of the RGGI auction proceeds. Information necessary to evaluate the performance of the RGGI investments is provided in the RGGI annual Investments of Proceeds update.  In order to determine reduction efficiency, I had to sum the values in the previous reports because the most recent report only reported lifetime benefits.  In order to account for future emission reductions against historical levels the annual reduction parameter must be used.  The Accumulated Annual Regional Greenhouse Gas Initiative Benefits table lists the sum of the annual avoided CO2 emissions generated by the RGGI investments from three previous reports.  The total of the annual reductions is 2,818,775 tons while the difference between the baseline of 2006 to 2008 compared to 2017 emissions is 59,508,436 tons.  The RGGI investments are only directly responsible for less than 5% of the total observed reductions!

In order to argue that RGGI emission reduction programs are a good investment relative to the expected societal cost of CO2 emissions the Social Cost of Carbon (SCC) parameter can be used.  SCC values range widely depending on assumptions, but if you use a discount rate of 3% and consider global benefits like the Obama-era Environmental Protection Agency (EPA) did then the 2020 SCC value is $50.  The Accumulated Annual Regional Greenhouse Gas Initiative Benefits table lists the data needed to calculate the RGGI CO2 reduction cost per ton.  From the start of the program in 2009 through 2017 RGGI has invested $2,527,635,414 and reduced annual CO2 emissions 2,818,775 tons.  The result, $897 per ton reduced, is 18 times than the current EPA SCC value for United States benefits.

There is another key lesson from RGGI that applies to any CO2 emissions marketing control program. There is an important difference between cap and trade programs for SO2 and nitrogen oxides (NOx) emissions and cap and invest programs for GHG emissions.  There are add-on control options for SO2 an NOx whereas there isn’t any cost-effective option for CO2.  In the ARP the affected sources could directly control their compliance.  In RGGI there were limited direct options for the affected sources and, going forward especially, they are going to have to rely on indirect reductions, i.e., someone will build a zero-emitting plant that displaces enough output from a fossil plant that enough allowances are available to cover the affected source requirements.  The ultimate control strategy for a emissions marketing CO2 control program is to run less and hope power is available from somebody else.


I believe that RGGI is not the success that its adherents believe. Based on the numbers there are some important caveats to the simplistic comparison of before and after emissions.  Fuel switching was the most effective driver of emissions reductions since the inception of RGGI.  Emission reductions from direct RGGI investments were only responsible for 5% of the observed reductions.  RGGI investments in emission reductions were not efficient at $897 per ton of CO2 removed.  In my opinion those are not the hallmarks of a successful program.

I want to highlight a related point.  In order to determine emission reduction efficiency from the RGGI investment reports, I had to sum the values in the previous reports because the most recent report only reported lifetime benefits.  The RGGI website only lists the lifetime benefits of RGGI investments in 2017 but those parameters are useless for the most obvious application.  In order to account for future emission reductions against historical levels the annual reduction parameter must be used.  It is hard to not believe that excluding the accumulated annual reductions was deliberate because the numbers are so poor.

As a model for future programs, RGGI successfully proved that a regional entity could implement a cap and auction program.  However, the actual cause of observed reductions and ability of affected sources to make the reductions proposed should be considered before other programs adopt the RGGI model.  I considered the use of the RGGI model in Transportation Climate Initiative Draft Framework Cap and Invest Caiazza Comments  that were submitted as part of their stakeholder process.  I concluded that there are so many differences between a program for mobile sources and electric generating units that simply implementing a tax and investing the proceeds as proposed would be less likely to have serious problems with unintended consequences and unanticipated issues.

As a result of the issues raised in this post, I believe that it is fair to ask whether any cap and trade program for CO2 can be successful if the ultimate goal is a significant reduction in emissions.  Because CO2 from fossil fuels is such an integral part of our lifestyles a large reduction in emissions is going to have to require changes in lifestyles.  Therefore, the question becomes will people accept lifestyle changes such as giving up the gas automobile with all its current advantages over any alternative as a result of indirect CO2 pricing?

Abuse of Air Quality Trends Data

When I first saw a graph from a New York Times article entitled “America’s air quality worsens, ending years of gains, study says” my first thought was that the reporter must have mis-read the analysis report. However, National Bureau of Economic Research working paper 26381 “Recent Increases in Air Pollution: Evidence and Implications for Mortality” by Karen Clay and Nicholas Z. Muller (hereinafter “Clay and Muller”) from Carnegie Mellon University apparently does claim that air quality is getting worse. I am spurred to check this claim out because the last time I checked all the air quality trends were down.

Although the emphasis of my work before retirement was environmental regulatory analysis coupled with emissions reporting I have always been primarily an air quality meteorologist. My experience includes managing an ambient air quality monitoring network, modeling air quality and interpreting the monitoring and modeling results for regulatory applications. Frankly, this claim struck a nerve with me and I felt I had to respond. The opinions expressed in this post do not reflect the position of any of my previous employers or any other company I have been associated with, these comments are mine alone.

The abstract for the Clay and Muller paper states:

After declining by 24.2% from 2009 to 2016, annual average fine particulate matter (PM2.5) in the United States in counties with monitors increased by 5.5% between 2016 and 2018. Increases occurred in multiple census regions and in counties that were in and out of attainment with National Ambient Air Quality Standards (NAAQS). We explore channels through which the increase may have occurred including increases in economic activity, increases in wildfires, and decreases in Clean Air Act enforcement actions. The health implications of this increase in PM2.5 between 2016 and 2018 are significant. The increase was associated with 9,700 additional premature deaths in 2018. At conventional valuations, these deaths represent damages of $89 billion.

The National Trend of PM2.5 graph attributed to the paper in the New York Times article shows an “alarming” reversal of the air quality trend. I am only going to respond to this trend claim and the discussion of possible causes. The discussion of health implications deserves a response too but that will have to wait.


The EPA PM basics page describes this pollutant.  PM2.5 is particulate matter with a diameter 2.5 micrometers and smaller.  It is also called fine inhalable particles and the key point is that these particles are so small that they can be inhaled deeply into the lungs.  Although this can clearly cause health problems there are controversies about threshold effects.  The EPA reference describes the sources of PM:

These particles come in many sizes and shapes and can be made up of hundreds of different chemicals.  Some are emitted directly from a source, such as construction sites, unpaved roads, fields, smokestacks or fires.  Most particles form in the atmosphere as a result of complex reactions of chemicals such as sulfur dioxide and nitrogen oxides, which are pollutants emitted from power plants, industries and automobiles.

Measuring particles this small is difficult and a representative national network for monitoring PM2.5 has only been available since 2000.  However, because most of these fine particles are created from sulfur dioxide and nitrogen oxides, we can use trends from those pollutants as a surrogate for expected levels of PM2.5.

EPA has trend data readily available for all the national ambient air quality standard pollutants.  Also included at the website is an interactive trend report.  Importantly for this post, the EPA website provides links for easy data downloads.

Clay and Muller Analysis

Clay and Muller used daily data from the EPA Air Quality Data System for all observations in the contiguous United States from 2009 to 2018.  They considered not only the total PM2.5 concentration but also the three major species: ammonium nitrate, sulfate and elemental carbon.  The dataset of 1.8 million daily readings was statistically processed to calculate trends not only nation-wide but also in different regions of the country.

Once they found their worrisome trend they examined three possible channels through which the recent increase may have occurred: economic activity, wild fires, and enforcement.  Economic activity was studied by looking at the speciated PM2.5 data to attribute the source of pollution.  Wildfire effects were determined by looking at the West, Midwest, and California regions by omitting June through September data.  To estimate the effect of enforcement they used an EPA database of “actions resulting in a penalty for violations of section 113d of the Act”.

The New York Times article claims that this work shows a reversal of a decades-long trend toward cleaner air and quotes study co-author Nick Muller, a professor of economics, engineering and public policy at Carnegie Mellon as saying “After a decade or so of reductions this increase is a real about-face.”

My Analysis

In order to do this kind of analysis correctly is a big deal.  Ambient air quality refers to the make-up of the air we breathe.  It is affected by air pollution emissions and the meteorological conditions that affect the transport and diffusion of the material between the time it is emitted and the time we breathe it.  For regulatory assessments whether the ambient concentrations comply with the National Ambient Air Quality Standards you need to consider both of those components.  As you can imagine setting up an inventory of all the pollutants that affect PM2.5, developing a meteorological database to model transport and diffusion and finally running a model that not only incorporates those factors but also includes the chemistry that changes the emissions to the chemicals we breathe is a massive undertaking.  Nonetheless, I think we can do something simpler to test the conclusions of the Clay and Muller paper.

Contrary to popular opinion calculating environmental trends is not as simple as you might first imagine.  For example, if the number and location of monitoring stations changes over time then the trends may change because of those changes and not because of some underlying difference in emissions, economic activity or enforcement actions.  As noted previously EPA analyzes and reports on air quality trends.  Importantly their primary consideration is to make sure the data they report represents what is actually happening and does not include data artifacts.  Another point is that because meteorological conditions affect pollution concentrations, we should expect variations in monitored values solely due to weather.  In order to minimize that effect the longer the period of record for the data the better because it averages the weather impacts out.

EPA PM2.5 trend data from a representative network of stations is available from the EPA website starting in 2000 so the obvious first thing to do is to look at all the data available.  The EPA Air Quality Data Summary table lists the annual nation-wide average, the year-to-year differences and the difference over the entire period of record and the difference between 2016 and 2018.  These numbers corroborate the claim that PM2.5 air quality did get worse the last two years.  However, the period of record air quality data in my table show that there has been a marked improvement since 2000:  PM2.5 is down nearly 40%, SO2 is down 82% and NOx is down 33%.  Even though there was a concentration increase the last two years, note that there were three other years when the PM2.5 concentrations failed to go down and two of them had higher increases than the last two years. Similar results are shown in the SO2 and NOx data.

Remember that ambient concentrations are a function of weather and emissions.  Rather than trying to estimate the effect of emissions on concentrations by looking at the observed content it is simpler, and much more likely to be accurate, to simply look at the emissions.  EPA also provides emissions trend data.  The EPA Emissions Data Summary table lists annual PM2.5, SO2 and NOx emissions data in the same format as the air quality data summary table.  These data include emissions from electric utilities, industry, storage, transportation, and a miscellaneous category that includes wildfires.  Estimating emissions from the wide variety of sources means that there is a wide range of data quality but I assume that these values are appropriate for the purpose at hand.  Note that according to these data PM2.5, SO2 and NOx emissions all went down not only over the period of record but also between 2016 and 2018.

Clay and Muller examined three possible channels through which the recent increase may have occurred: economic activity, wild fires, and enforcement.  In their analysis of economic activity, they conclude that “The chemical composition of particulates point to increased use of natural gas and to vehicle miles traveled as likely contributors to the increase in PM2.5”.  Because their analysis did not consider the potential effect of weather on transport and diffusion and because the emissions trend was down even while the ambient concentrations went up, I disagree with that conclusion.  With regards to wildfires, Clay and Muller conclude that wild fires “may account for some of the observed increase in PM2.5 from 2016 to 2018, but not for the general pattern of decline and then reversal.  I think that their methodology is too coarse to pick up a wildfire signal.  Even though the paper doesn’t find a link between enforcement actions and the PM2.5 trend they conclude “The decline in enforcement actions, however, is concerning in light of the increases in air pollution in both attainment and nonattainment counties after 2016.”  In the first place in my experience the majority of enforcement actions have little to do with emissions levels and mostly to do with reporting inconsistencies but I believe it is much more likely that enforcement actions are going down because the regulatory agencies are doing a good job.  That is to be applauded not to be a matter of concern.


I am not impressed with the methodology used in this paper.  Number crunching over a million records to determine a trend has risks that professors of economics apparently did not recognize.  Ambient levels of pollution are affected not only be emissions and the factors that they examined but also by meteorology and monitoring system issues.  The inter-annual changes noted were more likely simply due to meteorology as any change in emissions and precursor emissions that the Clay and Muller paper claimed.

I am trying to give the authors the benefit of the doubt that they did not know any better but I am frustrated that they apparently did not bother to seek the advice of any air quality meteorologist or air pollution monitoring scientist.  I am confident that anyone of those experts would have said the longer the trend the better and don’t expect a perfectly decreasing ambient air quality trend even when the emissions are decreasing over time.  Trying to tease out a rationale for an air quality trend change likely less than the variability of the measurements due to weather is an abuse of air quality trends.  Now that these results have shown up in the New York Times many people have been mislead.

October 28 2019 Buffalo NYS Public Participation Workshop on Regional Approaches to Climate and Transportation

On October 28, 2019 I attended the Buffalo NYS Public Participation Workshop on Regional Approaches to Climate and Transportation.  As I promised previously this post describes the meeting.

My over-whelming impression of this meeting is that the NYS Department of Environmental Conservation (DEC) and Department of Transportation (DOT) staff supporting the effort to develop a low-carbon transportation future believe that their public stakeholder process represents the will of the people.  I disagree with this characterization because my definition of “public” refers to society as a whole.  This stakeholder process has been confined to a limited and biased subset of the people based on my attendance at three meetings.  Please consider submitting a comment asking for costs which I think is the primary concern of the “public”.


According to the Transportation and Climate Initiative webpage:

“The Transportation and Climate Initiative (TCI) is a regional collaboration of 12 Northeast and Mid-Atlantic states and the District of Columbia that seeks to improve transportation, develop the clean energy economy and reduce carbon emissions from the transportation sector. The participating states are: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, and Virginia.”

This meeting was part of New York’s response to the TCI and a component of the response to the state’s Climate Leadership and Community Protection Act (CLCPA).  In order to meet the “most aggressive” climate law transportation controls are needed on the sector because as shown in the New York State GHG Emissions 1990–2016 table it is has the most emissions of any sector.  Moreover, because the CLCPA is now the law DEC and DOT have to come up with a plan to make reductions from the sector.

The invitation to the meeting described the purpose and provided links to background information:

“The State Departments of Environmental Conservation (DEC) and Transportation (DOT) and the New York State Energy Research and Development Authority (NYSERDA) are conducting public outreach to inform New York’s participation in a multi-state initiative to reduce greenhouse gas emissions from the transportation sector with the Transportation and Climate Initiative (TCI). DEC, DOT, and NYSERDA are seeking input from the public regarding New York’s potential participation in a regional program designed to reduce emissions, boost the economy, improve public health, and achieve fair and equitable outcomes for underserved communities and transportation-related businesses.”

“The states participating in the Transportation and Climate Initiative have released a framework for a draft regional policy proposal to reduce greenhouse gas emissions from transportation and are seeking public feedback. The framework can be reviewed at https://www.transportationandclimate.org/sites/default/files/TCI-Framework_10-01-2019.pdf. We invite the public to submit input to the TCI portal at https://www.transportationandclimate.org/main-menu/tci-regional-policy-design-stakeholder-input-form. Background materials are available at https://www.transportationandclimate.org/main-menu/tcis-regional-policy-design-process-2019.”

“In addition, DEC, DOT and NYSERDA are conducting public meetings to better understand various perspectives on New York’s potential participation in a regional policy. The agencies will also seek input on alternative or complementary strategies to reduce emissions from transportation.”

“Additional information is available on the DEC website https://www.dec.ny.gov/energy/99223.html.  Questions can be directed to climateandtransportation@dec.ny.gov.”


The agenda for the workshop that I attended had two main components.  After opening remarks that introduced speakers and introduced the topics, the first main component was “Key Elements of a Potential Regional Approach to Transportation and Climate”.  After a break the second component was a “Discussion on Investment Opportunities”.  The meeting ended with “suggestions, reflection and next steps”.

The description of the cap-and-invest program described their current thinking.  At this time, they plan to regulate state fuel suppliers of gasoline and on-road diesel.  That means the tank farms where distributors provide gasoline and diesel fuel that is sent to retail outlets will have to participate in the trading program.  They are doing analyses to determine the cap level and, as I understand it, the costs necessary to fund control programs to determine the rate of reductions that will be proposed.  Frankly, the lack of specificity for this aspect of the proposed framework is troubling and this meeting provided no details.

My primary interest in the meeting was the discussion of the multi-state process to develop a potential cap-and-invest program.  I have been involved with emissions marketing pollution control programs since 1990 and the Regional Greenhouse Gas Initiative (RGGI) since its inception over ten years ago so I wanted to see what they are thinking in the first half of the meeting.  In my opinion the proponents of a transportation cap-and-invest program overlook many of the lessons of RGGI.  Because they have to do something I took the opportunity to make the following suggestion for doing what I think will be least destructive and costly:

I think you should just go with a carbon tax rather than trying a cap and dividend program for the following reasons:

      • In the TCI framework the affected sources are state fuel suppliers.  They have no real stake in compliance with the cap and minor options to directly meet the cap. All they will do is sell fuel up to the cap limit and tack the price they paid for allowances onto the price they sell to fuel retailers.
      • RGGI was a cap and dividend program and it did not work out as well as many believe. Per the 2017 proceeds investment report that came out earlier this month, of the observed RGGI emission reductions less than 5% were directly attributed to dividend investments
      • The observed cost per ton of CO2 reduced was $897 – far higher than the social cost of carbon.
      • Logistically there is a cost issue. As reductions are made the amount of fuel sold will go down so the dividend proceeds will also go down.  How can you maintain the funding to keep up the rate of reductions needed?
      • I also worry that there will be cost increases related to the cap and dividend program that will increase cost to customers that will not be passed on as dividends to the public.

The second half of the meeting focused on the question “How could the proceeds from a cap-and-invest program promote cleaner transportation, improve public health, create economic opportunities, and enhance mobility?  While it is nice to come up with a list of possible investment projects such a list does not consider practicality and cost so I see little value in the exercise.  Faced with a two and a half hour ride home I left the meeting at the break.


As noted in the introduction my overall impression with this process is that the organizers and administrators truly believe that their public stakeholder process is representative of the “public”.  I disagree with this characterization because my definition of “public” refers to society as a whole and I have seen no indication that this topic has not been confined to a limited and biased subset of the public who have vested interests in transportation planning.  I base this impression on the three meetings I attended.

I went to the Georgetown Climate Center listening session in Albany, NY on April 9, 2018.  I don’t believe that there was public notice of the meeting because I got a call from NYS Department of Environmental Conservation Deputy Commissioner Jared Snyder asking why I wanted to attend.  He was clearly surprised that I knew about the meeting.  After assuring him that I would behave, I was allowed to attend.  When I showed up at the meeting, where I expected to be the only member of the public, I was surprised how many members of environmental organizations were present in addition to the regulatory agency people.   Whatever the motivation to check my rationale to participate, this was not an event that the general public knew about.

New York had its own listening sessions  to help advance a cleaner, safer, and more reliable low-carbon transportation future in the summer of 2018.  I attended the Central New York session on August 21, 2018.  The meeting was “designed to engage stakeholders with diverse interests and concerns in discussion of the economic and social considerations for deploying clean transportation options, opportunities to enhance environmental and public health benefits through a modernized transportation system, how innovative, low-carbon transportation can enhance quality of life and boost economic competitiveness, and what policies and programs may help advance a clean transportation future”.  Notice for this meeting was provided in the NYS DEC e-mail distribution system and there was a press release, so the general public as a whole might have had the opportunity to hear about the meeting.  However, attendance at the meeting was limited to members of environmental organizations, staff from transit agencies in the region, other people with a vested interest in a clean transportation future, and me.

Because the Buffalo meeting did not include an opportunity to formally meet people and the attendance list was not published, I don’t know the background of the attendees.  However, the people I did know were mostly agency staff so at least a third were there as part of their job.  The meeting was hosted by PUSH Buffalo whose mission is “to mobilize residents to create strong neighborhoods with quality, affordable housing; to expand local hiring opportunities; and to advance economic and environmental justice in Buffalo”.  As a result, I think that the majority of the rest of the audience were in that demographic or environmental organizations.  I do believe that there were some industry people in attendance but did not hear from any of them while I was at the meeting.

Therefore, I think it is presumptuous to say that these meetings provide engagement from the public, which I define as including anyone outside the wonky world of future transportation policy especially as it pertains to environmental justice.  Moreover, the format of these meetings was more about “what are the things we can do for clean transportation options” than “how can we implement these options and at what cost?”.  None of the meetings I attended addressed implementation issues, feasibility concerns, or potential costs.

Public Involvement

Roger Pielke Jr.’s Iron Law of Climate Policy states that “while people are often willing to pay some price for achieving environmental objectives, that willingness has its limits”.  I find it difficult to believe that the modeling mentioned at this meeting and described on the TCI webpage has not generated an estimated cost per gallon of fuel.  I believe that is an over-riding concern of the public so I suggest that asking for that information is entirely appropriate.

I think it is very important that residents of Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, and Virginia submit input to the TCI portal at https://www.transportationandclimate.org/main-menu/tci-regional-policy-design-stakeholder-input-form.   All you have to do is go to that link, fill out a few questions and then you can share your input with the Transportation and Climate Initiative.  I think a comment as simple as “I am concerned about the cost of this initiative and would like to know the expected cost increase to a gallon of gasoline.” from members of the public and not just the folks who go to these meetings would be effective.  By all means please consider making more extensive comments but the more people who ask for the costs the better.  New Yorkers could also send an email to climateandtransportation@dec.ny.gov asking for the expected cost.  I am not saying that they won’t ignore the request but at least they will be on notice that the public worries about the cost.

Final Note

By the way I did wear my yellow vest so I may go down as the first such protester at a NY meeting.  I did not go out of my way to get a reaction from the meeting attendees but I did make my point.  Over the years I have made the acquaintance of many people at DEC including Deputy Director Jared Snyder and now retired DEC climate advocate Lois New.  I got to the meeting early and had a chance to make sure they understood I was wearing the vest because I think yellow vest protests are inevitable.  Their reaction was a mixture of amusement (curmudgeon Roger is joking around again) and amazement (I don’t think that either Jared or Lois have contact with very many people who don’t agree with their views on climate change so this kind of confrontation surprised them.)

NYS Public Participation Workshop on Regional Approaches to Climate and Transportation

On October 28, 2019 I attended the Buffalo NYS Public Participation Workshop on Regional Approaches to Climate and Transportation.  I wore a yellow vest to the meeting because I believe that the policy suggested at the workshop will inevitably lead to prices that will be unacceptably high.  I also made up a handout if anyone asked about the yellow vest and that included a link to my posts on the Climate Leadership and Community Protection Act (CLCPA) page where I have posted this expanded version of the Handout DEC Workshop on Regional Approaches to Climate and Transportation.  I will post on the meeting itself later.

There have been multiple instances where expensive climate policies were the initial spark to protests that expanded in scope to cover more issues.  The French “Yellow Vest” movement was triggered in November 2018 when fuel prices were raised.  In October 2019 protests started in Chile when subway fares were increased.  The evidence in this post and my handout suggests that a similar protest could occur in New York as the 2030 requirement to reduce greenhouse gas (GHG) emissions to 60 percent of 1990 emissions levels in 2030 included in the CLCPA legislation is implemented.

The New York State GHG Emissions 1990–2016 table lists historical GHG emissions in New York.  The State has yet to provide a plan to meet the requirements of the CLCPA.  One way to meet the 2030 emission target in ten years would be to require all these sectors to reduce their 2016 emissions 30%.  While the ultimate plan probably will require different amounts from each sector the final strategy’s reduction requirements probably will not vary too much from 30% each.

I only considered the transportation sector in my handout.  The ultimate strategy to meet the CLCPA goals will have to specify options for each component of the transportation sector.   In order to meet a 30% reduction goal from this sector the plan could call for 30% electric vehicle conversions of each of these registration categories in the New York State Dept of Motor Vehicles Registrations in 2016 table.  For the standard registration category that means that we would need 2,844,099 electric vehicles on the road by 2030.  According to the NYS Energy Research & Development Authority (NYSERDA) there are 58,278 electric vehicle registrations in the state as of June 2019 and 35,296 were registered since January 2017.  As a result, we need to have 2,808,803 more electric vehicles to meet the 30% reduction goal and sales would have to average 244,244 electric vehicles per year.  That is over four times per year the total number of electric vehicles in the state in June 2019.

The transportation cap-and-invest program proposed would “cap emissions of carbon dioxide from the combustion of the fossil component of finished motor gasoline and on-road diesel fuel in the region”.  Owners of fuel at terminals would buy permits to sell the equivalent amount of fuel corresponding to the emissions cap and then New York will invest the money received in programs to reduce fuel use.  One investment could be to fund the current $2,000 NYSERDA incentive for the purchase of electric vehicles.  In the previous example that is $488 million per year and would roughly add 9 cents per gallon.  However, the $2,000 per car incentive is not working well enough to get many people to purchase them.  If the incentive is kicked up to $10,000 per vehicle then the cap cost would go up to 43 cents per gallon.  The cost per electric vehicle is just the start of the costs necessary to implement over two million electric vehicles.  What is the plan for charging infrastructure particularly in cities where residents have to park in lots or on the street and how much will that cost?

A recent poll asked the public how much they were willing to pay to combat climate change.  The poll found that “To combat climate change, 57 percent of Americans are willing to pay a $1 monthly fee and 23 percent are willing to pay a monthly fee of $40.”  Dividing the NYS annual gasoline sales of 5.73 million gallons in 2016 by the 9,480,329 standard registrations averages 50 gallons per month so the nine cents per gallon equates to $4.29 per month but would rise to $21 a month for 43 cents per gallon to fund a $10,000 per vehicle incentive.

Advocates for the cap-and-invest program point to the Regional Greenhouse Gas Initiative (RGGI) as model of a program that works.  I believe that RGGI has significant differences that make the approach unlikely to work well if at all.  In RGGI, affected sources did not have viable options to install control equipment but could switch to a lower emitting fuel.  I have calculated that fuel switching was the cause of most of the reductions and that reductions linked directly to investments from the auction dividends provided only 5% of the total reductions.  Another big difference is that affected sources have different stakes.  The TCI proposed cap and dividend approach proposes to regulate state fuel suppliers.  In RGGI affected sources were penalized if they did not comply but the TCI affected sources have no stake in compliance with the cap.  They will only sell whatever amount of fuel is specified by the cap and will not worry about how society meets the cap.  As a result, the TCI price signal has to be high enough to force the public to reduce fuel use and TCI dividend investments have to give citizens viable options that use less fuel.

There is another problem.  The RGGI dividend investment results did not reduce emissions enough to meet the cap.  If the TCI investments don’t reduce emissions sufficiently to meet the cap necessary to meet New York’s CLCPA targets, then the inevitable outcome is that there will be more demand for fuel than the cap allows and the amount of fuel available will be limited.  It is inconceivable to me that government-caused fuel outages would be acceptable to the citizens of New York.

Ultimately a cap-and-dividend program equates to a tax.  Just as taxes are invested by government for services this approach takes in money that supposedly will be invested to promote cleaner transportation, improve public health, create economic opportunities, and enhance mobility.  Before anyone can reasonably be expected to decide to support this program the State needs to provide their plan for specific programs and resulting costs.  What is the expected increase to fuel prices for this new tax and how will it be structured so that the those least able to afford a price increase not be adversely affected in general and particularly the rural poor located beyond the availability of public transit?

Most importantly, this analysis looks only at one sector.  The electric generation, residential, commercial, industrial and other sectors all have to make similar reductions.  Given that the costs of just this sector fall between the amount 57% and 23% of the public are willing to pay I believe it is clear that there will be pushback similar to the French “yellow vest” movement in New York when the costs of the CLCPA become apparent.  Roger Pielke Jr.’s Iron Law of Climate Policy states that “while people are often willing to pay some price for achieving environmental objectives, that willingness has its limits”.  New York will test that law.