Scientific Critique of IPCC’s 2013 ‘Summary for Policymakers’

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by Craig D. Idso, Robert M. Carter, S. Fred Singer, and Willie Soon*
Introduction

The United Nations’ Intergovernmental Panel on Climate Change (IPCC) released a final version of the Summary for Policymakers (SPM) of its Fifth Assessment Report on September 27, 2013. It differs in important ways from a draft SPM dated June 2013 that circulated widely in the preceding months.
As discussed below, the new SPM reveals the IPCC has retreated from at least 11 alarmist claims promulgated in its previous reports or by scientists prominently associated with the IPCC. The SPM also contains at least 13 misleading or untrue statements, and 11 further statements that are phrased in such a way that they mislead readers or misrepresent important aspects of the science.

Two weeks before the IPCC released its report, an alternative perspective was presented by a different group of scientists, the Nongovernmental International Panel on Climate Change (NIPCC) (Idso et al., 2013). Unlike the IPCC, NIPCC’s charter is to investigate the causes and consequences of climate change “in the round,” or from all perspectives, rather than to search only for evidence of a human impact on climate. The NIPCC report, titled Climate Change Reconsidered II: Physical Science contradicts many of the IPCC’s findings.
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The IPCC has retreated from at least 11 alarmist claims promulgated in its previous reports or by scientists prominently associated with the IPCC. The SPM also contains at least 13 misleading or untrue statements, and 11 further statements that are phrased in such a way that they mislead readers or misrepresent important aspects of the science.


In the discussion that follows, IPCC quotations are identified by their page number in the SPM using the same numbering method (e.g., SPM-3) used in the SPM itself. Chapters in the NIPCC report providing evidence contrary to the IPCC’s claims are referenced as “NIPCC, Chapter X.” The NIPCC report and its Summary for Policymakers are available online atwww.climatechangereconsidered.org.
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* Drs. Craig Idso, Robert Carter, S. Fred Singer, and Willie Soon are scientists and lead authors or chapter lead authors of ClimateChangeReconsideredII:PhysicalScience,a comprehensive review of the peer- reviewed literature on climate change released in September 2013 by the Nongovernmental International Panel on Climate Change (NIPCC). Their biographies appear on pages 16-17.
© 2013 NIPCC. Nothing in this report should be construed as supporting or opposing any proposed or pending legislation, or as necessarily reflecting the views of NIPCC or its sponsors.

Read more: http://wattsupwiththat.com/2013/10/...ccs-2013-summary-for-policymakers/#more-95880
 
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