Scientists Respond to the Obama Administration’s 2014 National Climate Assessment

Re-Posted from “Watts Up with That” Blog (WUWT)

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National_Climate_Assessment_logoThe National Climate Assessment – 2014 (NCA) is a masterpiece of marketing that shows for the first time the full capabilities of the Obama Administration to spin a scientific topic as they see fit, without regard to the underlying facts. With hundreds of pages written by hundreds of captive scientists and marketing specialists, the administration presents their case for extreme climate alarm. This is a rebuttal drafted by 14 independent meteorology and climatology experts.

As independent scientists, we know that apparent evidence of “Climate Change,” however scary, is not proof of anything. Science derives its objectivity from robust logic and honest evidence repeatedly tested by all knowledgeable scientists, not just those paid to support the administration’s version of “Global Warming,” “Climate Change,” “Climate Disruption,” or whatever their marketing specialists call it today.

We are asked to believe that humans are drastically changing the earth’s climate by burning fossil fuels. The problem with their theory is very simple: It is NOT true.

Here we address the administration’s basic thesis and the essential evidence that they claim support extreme concern.

The theory of ‘Catastrophic Anthropogenic Global Warming’ (CAGW) is based on a string of inferences that begins with the assumptions that carbon dioxide is a ‘greenhouse gas’ and that we are slowly driving up the atmospheric concentration by burning fossil fuels. It is therefore claimed as self-evident that the Global Average Surface Temperature (GAST) has already risen significantly and will continue to do so. Higher GAST is then presumed to lead to all sorts of negative consequences, especially Extreme Weather. They promote their ‘Climate Models’ as a reliable way to predict the future climate. But these models dramatically fail basic verification tests. Nowhere do they admit to these well-known failures. Instead, we are led to believe that their climate models are close to perfection.

This document is structured around a “fact-check,” where we quote a number of the government’s key claims in the NCA and show each to be invalid. The first three claims involve their three crucial scientific arguments (Three Lines of Evidence or 3 LoE), which, if valid, would satisfy a necessary, but not sufficient, condition for making their case. But each is easily shown to be false; and because each is crucial, their entire theory collapses. That means that all of the overblown “Climate Disruption” evidence that they mention, whether true or not, cannot be tied back to man’s burning of fossil fuels. Hence, efforts to reduce or eliminate Extreme Weather by reducing the burning of fossil fuels are completely nonsensical.

NCA CLAIM #1: “First ‘Line of Evidence’ (LoE) – Fundamental Understanding of GH Gases

“The conclusion that human influences are the primary driver of recent climate change is based on multiple lines of independent evidence. The first line of evidence is our fundamental understanding of how certain gases trap heat, how the climate system responds to increases in these gases, and how other human and natural factors influence climate.” (NCA, Page 23)

RESPONSE: Many scientists have provided ample evidence that the government’s finding, used by the Environmental Protection Agency (EPA), is grossly flawed. In its Endangerment Finding, EPA claimed with 90-99% certainty that observed warming in the latter half of the twentieth century resulted from human activity. Using the most credible empirical data available, it is relatively straightforward to soundly reject each of EPA’s Three LoE. This U.S. Supreme Court Amicus brief contains the details:…2.pdf

EPA’s Greenhouse Gas ‘Hot Spot’ theory is that in the tropics, the mid-troposphere must warm faster than the lower troposphere, and the lower troposphere must warm faster than the surface, all due to rising CO2 concentrations. However, this is totally at odds with multiple robust, consistent, independently-derived empirical datasets, all showing no statistically significant positive (or negative) trend in temperature and thus, no difference in trend slope by altitude. Therefore, EPA’s theory as to how CO2 impacts GAST must be rejected. Below is a graphical comparison of their Hot Spot theory versus reality, where reds denote warming and blues, cooling. Clearly, the government’s understanding of how CO2 gas traps heat is fundamentally flawed.

Models (top) vs. Measured Temperatures Changes (bottom)


Temperature plotted by Latitude -vs- Height (Atmospheric pressure)


NCA CLAIM #2: “Second LoE – Unusual Warming in recent decades”

Please see remainder of Post here: Re-Posted from “Watts Up with That” Blog (WUWT)