REBUTTAL: IPCC SR15 Climate Change Report is Based on Faulty Premises

by Anthony Watts, October 31, 2018 in WUWT

Friends of Science Society is critical of the IPCC SR15 report, pointing out the following:

  1. We are in the Meghalayan, not the Anthropocene. The IPCC SR15 report claims to view climate change through “the lens of the Anthropocene.” This term is popularly used to describe a modern geological period wherein humans are assumed to have a larger impact on the world than nature. On July 13, 2018, the International Union of Geological Sciences (IUGS) issued a statement that the earth is now in the Meghalayan, a period that began 4,200 years ago.  In response to questions as to why the term “Anthropocene” had not been included, at least for the past 50 years of presumed human influence, the IUGS responded that the term “Anthropocene” has not even been submitted for consideration and that the term has only sociological, not scientific relevance.  The IPCC should not use this ‘lens.’

  2. All climate models (simulations) used by the IPCC run ‘too hot’ versus observations. The computer simulations project future warming (thus being the rationale for global warming climate policies) show significantly higher temperatures than what is being observed. Only the Russian climate model and satellite/weather balloon data closely match present temperatures in the lower troposphere. This suggests that most climate models ascribe too great an effect of warming (climate sensitivity) to carbon dioxide.

    This means the climate models should not be used to set public policy.

  3. No temperature can be accurately measured to a precision of less than ±0.1°C. global temperature data is a metric of averaged and adjusted data from many sources, suggesting that a 0.5°C difference in temperature is moot and an arbitrary figure. It does not reference an actual measurement of earth’s temperature; people are being misled.