<div>Which institution is a more credible source of well peer reviewed professional science, Anthony Watts' "Wattsupwiththat" blog, or the National Academy of Sciences? </div>
<div> </div>
<div>Given the recent and widespread critical attacks against the professional competence of certain climate scientists regarding their published peer reviewed work on temperature analysis, coming from blogs of rather questionable scientific integrity, it's appropriate to read the actual published work of these scientists in question, for balance.</div>
<div> </div>
<div>Content below at first website offers critical discussion of "Mike's Nature trick," a reference to a phrase in an e-mail from recently stolen possibly altered hacked e-mails of the Climatic Research Unit at East Anglia University in the UK. The e-mail in question was allegedly sent by CRU scientist Phil Jones, to climate scientists Michael Mann, Raymond Bradley and Malcolm Hughes, dealing with the climate science of temperature analysis:</div>
<div> </div>
<div><a href="http://wattsupwiththat.com/2009/11/20/mikes-nature-trick/">http://wattsupwiththat.com/2009/11/20/mikes-nature-trick/</a></div>
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<div>This e-mail under discussion also includes the phrase "hide the decline" which is also discussed critically on the "Wattsupwiththat" blog at this website:</div>
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<div><a href="http://wattsupwiththat.com/2009/12/06/american-thinker-understanding-climategates-hidden-decline/">http://wattsupwiththat.com/2009/12/06/american-thinker-understanding-climategates-hidden-decline/</a></div>
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<div>At website below is a peer reviewed published article in the Proceedings of the National Academy of Sciences, authored in part by Michael Mann, Raymond Bradley and Malcolm Hughes, dealing with some of the same temperature analysis issues as are critiqued in the "Wattsupwiththat" blog discussions above. If this paper contained seriously flawed science, then the peer review process at the National Academy of Sciences is in question. However, I suspect the peer review process is exemplary at the NAS, and that the science in this paper is highly competent.</div>
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<div>I'm not an expert on these complex climate science questions. But I think climate scientists Mann, Bradley and Hughes in their peer reviewed work as monitored by the National Academy of Sciences, are more credible than Anthony Watts' "Wattsupwiththat" blog as a source of competent credible science.</div>
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<div>Article in full:</div>
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<div><a href="http://www.pnas.org/content/105/36/13252.full.pdf+html">http://www.pnas.org/content/105/36/13252.full.pdf+html</a></div>
<div> </div>
<div>Abstract:</div>
<div> </div>
<div><a href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract">http://www.pnas.org/content/early/2008/09/02/0805721105.abstract</a></div>
<div>
<h1 id="article-title-1">Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia</h1>
<div class="contributors">
<ol class="contributor-list" id="contrib-group-1">
<li id="contrib-1"><span class="name"><a class="name-search" href="http://www.pnas.org/search?author1=Michael+E.++Mann&sortspec=date&submit=Submit">Michael E. Mann</a></span><a class="xref-aff" id="xref-aff-1-1" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#aff-1">*</a><span class="xref-sep">,</span><a class="xref-corresp" id="xref-corresp-1-1" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#corresp-1"><sup>†</sup></a>,
<li id="contrib-2"><span class="name"><a class="name-search" href="http://www.pnas.org/search?author1=Zhihua++Zhang&sortspec=date&submit=Submit">Zhihua Zhang</a></span><a class="xref-aff" id="xref-aff-1-2" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#aff-1">*</a>,
<li id="contrib-3"><span class="name"><a class="name-search" href="http://www.pnas.org/search?author1=Malcolm+K.++Hughes&sortspec=date&submit=Submit">Malcolm K. Hughes</a></span><a class="xref-aff" id="xref-aff-2-1" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#aff-2"><sup>‡</sup></a>,
<li id="contrib-4"><span class="name"><a class="name-search" href="http://www.pnas.org/search?author1=Raymond+S.++Bradley&sortspec=date&submit=Submit">Raymond S. Bradley</a></span><a class="xref-aff" id="xref-aff-3-1" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#aff-3"><sup>§</sup></a>,
<li id="contrib-5"><span class="name"><a class="name-search" href="http://www.pnas.org/search?author1=Sonya+K.++Miller&sortspec=date&submit=Submit">Sonya K. Miller</a></span><a class="xref-aff" id="xref-aff-1-3" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#aff-1">*</a>,
<li id="contrib-6"><span class="name"><a class="name-search" href="http://www.pnas.org/search?author1=Scott++Rutherford&sortspec=date&submit=Submit">Scott Rutherford</a></span><a class="xref-aff" id="xref-aff-4-1" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#aff-4"><sup>¶</sup></a>, and
<li id="contrib-7"><span class="name"><a class="name-search" href="http://www.pnas.org/search?author1=Fenbiao++Ni&sortspec=date&submit=Submit">Fenbiao Ni</a></span><a class="xref-aff" id="xref-aff-2-2" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#aff-2"><sup>‡</sup></a> </li>
</li></li></li></li></li></li></ol>
<p class="affiliation-list-reveal"><a class="view-more" href="http://www.pnas.org/content/early/2008/09/02/0805721105.abstract#">+</a> Author Affiliations</p>
<ol class="affiliation-list hideaffil">
<li class="aff"><a id="aff-1" name="aff-1"></a>
<address>*Department of Meteorology and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802; </address>
<li class="aff"><a id="aff-2" name="aff-2"></a>
<address><sup>‡</sup>Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721; </address>
<li class="aff"><a id="aff-3" name="aff-3"></a>
<address><sup>§</sup>Department of Geosciences, University of Massachusetts, Amherst, MA 01003-9298; and </address>
<li class="aff"><a id="aff-4" name="aff-4"></a>
<address><sup>¶</sup>Department of Environmental Science, Roger Williams University, Bristol, RI 02809 </address></li></li></li></li></ol>
<ol class="fn-track">
<li class="fn-com" id="fn-2">
<p id="p-2">Communicated by Lonnie G. Thompson, Ohio State University, Columbus, OH, June 26, 2008 (received for review November 20, 2007)</p></li></ol></div>
<div class="section abstract" id="abstract-1">
<h2>Abstract</h2>
<p id="p-4"><font size="4">Following the suggestions of a recent National Research Council report [NRC (National Research Council) (2006) <em>Surface Temperature Reconstructions for the Last 2,000 Years</em> (Natl Acad Press, Washington, DC).], we reconstruct surface temperature at hemispheric and global scale for much of the last 2,000 years using a greatly expanded set of proxy data for decadal-to-centennial climate changes, recently updated instrumental data, and complementary methods that have been thoroughly tested and validated with model simulation experiments. Our results extend previous conclusions that recent Northern Hemisphere surface temperature increases are likely anomalous in a long-term context. Recent warmth appears anomalous for at least the past 1,300 years whether or not tree-ring data are used. If tree-ring data are used, the conclusion can be extended to at least the past 1,700 years, but with additional strong caveats. The reconstructed amplitude of change over past centuries is greater than hitherto reported, with somewhat greater Medieval warmth in the Northern Hemisphere, albeit still not reaching recent levels. </font></p>
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<p>Vision2020 Post: Ted Moffett</p></div></div>