Topic: Energy and Environment

Taming the Greenland Melting Global Warming Hype

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

There is a new paper generating some press attention (e.g. Chris Mooney at the Washington Post) that strongly suggests global warming is leading to specific changes in the atmospheric circulation over the Northern Hemisphere that is causing an enhancement of surface melting across Greenland—and of course, that this mechanism will make things even worse than expected into the future.

We are here to strongly suggest this is not the case.

The new paper is by a team of authors led by Marco Tedesco from Columbia University’s Lamont-Doherty Earth Observatory. The main gist of the paper is that Arctic sea ice loss as a result of human-caused global warming is causing the jet stream to slow down and become wigglier—with deeper north-south excursions that hang around longer.  This type of behavior is referred to as atmospheric “blocking.”

If this sounds familiar, it’s the same theoretical argument that is made to try to link wintertime “polar vortex” events (i.e., cold outbreaks) and blizzards to global warming. This argument which has been pretty well debunked, time and time again.

Well, at least it has as it concerns wintertime climate.

The twist of the new Tedesco and colleagues’ paper is that they’ve applied it to the summertime climate over Greenland. They argue that global warming is leading to an increase in blocking events over Greenland in the summer and that is causing warm air to be “locked” in place leading to enhanced surface melting there. Chris Mooney, who likes to promote climate alarm buzzwords, refers to this behavior as “weird.” And he describes the worrysome implications:

The key issue, then, is whether 2015 is a harbinger of a future in which the jet stream keeps sending Greenland atmospheric systems that drive major melt — and in turn, whether the Arctic amplification of climate change is driving this. If so, that could be a factor, not currently included in many climate change simulations, that would worsen the ice sheet’s melt, drive additional sea level rise and perhaps upend ocean currents due to large influxes of fresh water.

As proof that things were weird over Greenland in recent summers, Tedesco’s team offers up this figure in their paper:

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This chart (part of a multipanel figure) shows the time history of the North Atlantic Oscillation (NAO—a pattern of atmospheric variation over the North Atlantic) as red bars and something called the Greenland Blocking Index (GBI) as the black line, for the month of July during the period 1950-2015. The chart is meant to show that in recent years, the NAO has been very low with 2015 being “a new record low of -1.23 (since 1899),” and the GBI has been very high with the authors noting that “[c]oncurrently, the GBI also set a new record for the month of July [2015].” Clearly the evidence is showing that atmospheric blocking increasing over Greenland which fits nicely into the global warming/sea ice loss/wiggly jet stream theory.

So what’s our beef?

A couple of months ago, some of the same authors of the Tedesco paper (notably Ed Hanna) published a paper showing the history of the monthly GBI going back to 1851 (as opposed to 1950 as depicted in the Tedesco paper).

Here’s their GBI plotted for the month of July from 1851 to 2015:

This picture tells a completely different story. Instead of a long-term trend that could be related to anthropogenic global warming, what we see is large annual and multidecadal variability, with the end of the record not looking much different than say a period around 1880 and with the highest GBI occurring in 1918 (with 1919 coming in 2nd place). While this doesn’t conclusively demonstrate that the current rise in GBI is not related to jet stream changes induced by sea ice loss, it most certainly does demonstrate that global-warming induced sea ice loss is not a requirement for blocking events to occur over Greenland and that recent events are not  at all “weird.”  An equally plausible, if not much more plausible, expectation of future behavior is that this GBI highstand is part of multidecadal natural variability and will soon relax back towards normal values.  But such an explanation isn’t Post-worthy.

Another big problem with all the new hype is that history shows the current goings-on in Greenland to be irrelevant, because humans just can’t make it warm enough up there to melt all that much ice. For example, in 2013, Dorthe Dahl-Jensen and her colleagues published a paper in Nature detailing the history of the ice in Northwest Greenland during the beginning of the last interglacial, which included a 6,000 year period in which her ice core data showed averaged a whopping 6⁰C warmer in summer than the 20th century average. Greenland only lost around 30% of its ice with a heat load of (6 X 6000) 36,000 degree-summers. The best humans could ever hope to do with greenhouse gases is—very liberally—about 5 degrees for 500 summers, or (5 X 500) 2,500 degree-summers. In other words, the best we can do is 500/6000 times 30%, or a 2.5% of the ice, resulting in a grand total of seven inches of sea level rise over 500 years. That’s pretty much the death of the Greenland disaster story, despite every lame press release and hyped “news” article on it.

While you won’t find this kind of analysis elsewhere, we’re happy to do it here at Cato. 


Dahl-Jensen, D., et al., 2013.  Eemian interglacial reconstructed from a Greenland folded ice core.  Nature 489, doi: 10.1038/nature11789.

Hanna, E., et al., 2016. Greenland Blocking Index 1851-2015: a regional climate change signal. International Journal of Climatology, doi: 10.1002/joc.4673.

Tedesco, M., et al., 2016. Arctic cut-off high drives the poleward shift of a new Greenland melting record. Nature Communications, DOI: 10.1038/ncomms11723,

Protecting the Nation’s Environment From the EPA

A victory for property rights and individual liberty came via the unanimous Supreme Court decision earlier this month against EPA’s ability to control the “environment” on private property—though their use of wetlands “jurisdictional determinations” under the Clean Water Act. The high court’s opinion states that land owners are now able to challenge government agencies that attempt to assert control over the environment of private property before any permitting process by the owner begins—versus after the owners expenditure of time, effort and expense to obtain a permit. Furthermore, this court’s decision will limit the government’s ability to restrict land owners activities through the application of EPA’s “Waters of the United States” (WOTUS) rule issued last year.

This is the second major SCOTUS decision this year to go against the EPA—the other being the stay issued in February against EPA’s Clean Power Plan. Compared to previous administrations, this EPA appears to be spending way too much time in court defending its actions, and not nearly enough time effectively protecting the nation’s environment. Some of the agency’s actions, or inactions, have resulted in environmental damage. Two glaring examples are last year’s contamination of Colorado’s Animas River drinking water supply, and the ongoing lead contamination of drinking water in Flint, Michigan.

Then there is the fallout from EPA’s regulatory agenda—particularly the Clean Power Plan—their crown jewel of carbon emissions rulemaking. Although the CPP was stayed, EPA officials are not deterred and are now moving ahead with key components of the plan, particularly in those 17 states lead by democrat governors. The EPA may be flagrantly violating the law by ignoring the Supreme Court ruling on the CPP. According to the electric utility industry, 30 states, and their state agencies, all of whom are suing to eliminate the plan—EPA is absolutely in violation. 

There is also demonstrated collusion between EPA employees and outside environmental interests. FOIA requests and legal depositions have revealed a pattern of illicit email trails and phone calls between EPA officials and radical environmental groups. In some cases the outside groups have actually “co-authored” EPA regulations—creating a circus out of federal agency rulemaking—which is supposed to be based on transparent public participation and not “insider trading” by the environmental movement.

The Climate Alarm Death Knell Sounds Again

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.” 

Currently, details are few, but apparently the results of a major scientific study on the effects of anthropogenic aerosols on clouds are going to have large implications for climate change projections—substantially lowering future temperature rise expectations.

In a blog post from the Department of Meteorology of the University of Reading, Dr. Nicolas Bellouin describes some preliminary results from a research study he leads that is investigating the influence of aerosols on cloud properties.  The behavior of clouds, including how they are formed, how long they last, how bright they are, etc., plays a very large role in the earth’s climate system, and is considered the weakest part of global climate models. The climate model cloud deficiency results from a combination of scientific uncertainty about cloud behavior, as well as the modeling challenges that come from simulating the small spatial and temporal scales over which the important processes take place.

When it comes to the influence of human aerosol emissions on cloud properties, the scientific mainstream view is that aerosols modify clouds in such a way as to result in an enhanced cooling of the earth’s surface—a cooling influence which has acted to offset some portion of the warming influence resulting from human emissions of greenhouse gases (primarily from the burning of fossil fuels, like coal, oil, and natural gas to produce energy).  In the absence of this presumed aerosol cooling effect, climate models predict that the earth should warm at a much faster rate than has been observed.  A large cooling effect from aerosols was thus introduced in the early 1990s as a way to “fix” the climate models and bring them closer in line with the modest pace of observed warming. Despite that “fix,” climate models continue to overpredict the observed warming rate—which is bad enough news for climate models already.

You Ought to Have a Look: A Shout-Out to Lukewarming, a Look at the Republic of Science and a “Roundup” of EPA and Glyphosate

You Ought to Have a Look is a feature from the Center for the Study of Science posted by Patrick J. Michaels and Paul C. (“Chip”) Knappenberger.  While this section will feature all of the areas of interest that we are emphasizing, the prominence of the climate issue is driving a tremendous amount of web traffic.  Here we post a few of the best in recent days, along with our color commentary.

We’ve put together an interesting collection of articles this week for your consideration.

First up is a shout out to lukewarming from Bloomberg View columnist Megan McArdle. In her piece “Global Warming Alarmists, You’re Doing It Wrong,” McArdle suggests that lukewarmers have a lot to bring to the climate change table, but are turned away by the entrenched establishment and tarred with labels like climate “denier”—a label which couldn’t be further from the truth. McArdle writes:

Naturally, proponents of climate-change models have welcomed the lukewarmists’ constructive input by carefully considering their points and by advancing counterarguments firmly couched in the scientific method.

No, of course I’m just kidding. The reaction to these mild assertions is often to brand the lukewarmists “deniers” and treat them as if what they were saying was morally and logically equivalent to suggesting that the Holocaust never happened.

In her article, McArdle calls for less name calling and less heel digging and more open, constructive discussion:

There is a huge range of possible beliefs that go into assessing the various complicated theories about how the climate works, and the global-warming predictions generated by those theories range from “could well be catastrophic” to “probably not a big deal.” I know very smart, well-informed, decent people who fall at either end of the spectrum, and others who are somewhere in between. Then there are folks like me who aren’t sure enough to make a prediction, but are very sure we wouldn’t like to find out, too late, that the answer is “oops, catastrophic.”

These are not differences that can be resolved by name calling. Nor has the presumed object of this name calling – to delegitimize thoughtful opposition, and thereby increase the consensus in favor of desired policy proposals – been a notable political success, at least in the U.S. It has certainly rallied the tribe, and produced a lot of patronizing talk about science by people who aren’t actually all that familiar with the underlying scientific questions. Other than that, we remain pretty much where we were 25 years ago: holding summits, followed by the dismayed realization that we haven’t, you know, really done all that much except burn a lot of hydrocarbons flying people to summits. Maybe last year’s Paris talks will turn out to be the actual moment when things started to change – but having spent the last 15 years as a reporter listening to people tell me that no, really, we’re about to turn the corner, I retain a bit of skepticism.

How was this bit of advice from McArdle received by some of the loudest name-callers? Not well, as she describes in this follow-up:

Government Exceeds Its Powers in Enforcing the Endangered Species Act

“It is not rational, never mind ‘appropriate,’ to impose billions of dollars in economic costs in return for a few dollars in health or environmental benefits,” the Supreme Court held last year in Michigan v. EPA.It seems that the U.S. Fish and Wildlife Service (USFWS) did not get the message, with its willy-nilly imposition of significant economic costs when designating “critical habitat” for endangered species.

A California builders’ association is now asking the Court to establish that judicial review is available for individuals and businesses affected by these agency actions that purport to enforce the Endangered Species Act (ESA). The ESA specifically requires federal agencies to take economic impacts into consideration, but the USFWS routinely ignores the costs of designating land as a critical habitat. The San Francisco-based U.S Court of Appeals for the Ninth Circuit held that the designation of critical habitat is an action fully committed to agency discretion, and that it may ignore any cost implications at its leisure, but this would seem to contradict Michigan v. EPA and other precedent.

The USFWS employs a cost-benefit accounting method called “baseline analysis,” which separates the impacts that would occur absent designation (baseline impacts) from the impacts attributable to designation (incremental impacts). It then only considers the incremental impacts, despite enormous disparities between baseline and incremental costs—one order of magnitude or two—and fanciful estimates that the economic impact of critical habitat designation is often $0.

Cato, joined by the Reason Foundation and National Federation of Independent Business, filed an amicus brief urging the Supreme Court to take up this important question of whether courts can even review the government’s Enron-style of cost-benefit analysis. Independent research by Reason’s Brian Seasholes found that in examining 159 of the 793 species that have critical habitat designation, there are at least $10.7 billion in economic impacts, hundreds of jobs lost per species designated, and regulatory burdens affecting 60,169,546 acres of land (11,261,054 privately owned) spanning 37 states and two territories.

Arctic Methane Scare Oversold

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

Methane is all the rage. Why? Because 1) it is a powerful greenhouse gas, that molecule for molecule, is some 25 times as potent as carbon dioxide (when it comes to warming the lower atmosphere),  2) it plays a feature role in a climate scare story in which climate change warms the Arctic, releasing  methane stored there in the (once) frozen ground, which leads to more warming and more methane release, ad apocalypse, and 3) methane emissions are  also be linked to fossil fuel extraction (especially fracking operations). An alarmist trifecta!

Turns out, though, that these favored horses aren’t running as advertised.

Elevated CO2 and Temperature Enhance the Grain Yield and Quality of Rice

Setting the stage for their study, Roy et al. (2015) write that rice is “one of the most important C3 species of cereal crops,” adding that it “generally responds favorably to elevated CO2.” However, they note that the actual response of rice crops to elevated CO2 and warming “is uncertain.” The team of five Indian scientists set out “to determine the effect of elevated CO2 and night time temperature on (1) biomass production, (2) grain yield and quality and (3) C [carbon], N [nitrogen] allocations in different parts of the rice crop in tropical dry season.”

The experiment they designed to achieve these objectives was carried out at the ICAR-Central Rice Research Institute in Cuttack, Odisha, India, using open-top-chambers in which rice (cv. Naveen) was grown in either control (ambient CO2 and ambient temperature), elevated CO2 (550 ppm, ambient temperature) or elevated CO2 and raised temperature (550 ppm and +2°C above ambient) conditions for three separate growing seasons.

In discussing their findings, Roy et al. write that the aboveground plant biomass, root biomass, grain yield, leaf area index and net C assimilation rates of the plants growing under elevated CO2 conditions all showed significant increases (32, 26, 22, 21, and 37 percent, respectively) over their ambient counter-parts. Each of these variables were also enhanced under elevated CO2 and increased temperature conditions over ambient CO2 and temperature, though to a slightly lesser degree than under elevated CO2 conditions alone. 

With respect to grain quality, the authors report there was no difference among the parameters they measured in any of treatments, with the exception of starch and amylose content, which were both significantly higher in the elevated CO2 and elevated CO2 plus elevated temperature treatments. The C and N grain yields were also both significantly increased in both of these treatments compared with control conditions.

The results of this study thus bode well for the future of rice production in India during the dry season. As the CO2 concentration of the air rises, yields will increase.  And if the temperature rises as models project, yields will still increase, though by not quite as much. These findings, coupled with the fact that the grain nutritional quality (as defined by an increase in amylose content) was enhanced by elevated CO2, suggest there is a bright future in store for rice in a carbon dioxide-enhanced atmosphere.



Roy, K.S., Bhattacharyya, P., Nayak, A.K., Sharma, S.G. and Uprety, D.C. 2015. Growth and nitrogen allocation of dry season tropical rice as a result of carbon dioxide fertilization and elevated night time temperature. Nutrient Cycling in Agroecosystems 103: 293-309.