Category Archives: Proxies

The Stokes-Kaufman contamination protocol – a ‘sticky’ wicket

Posted on May 1, 2013 by

Over at Climate Audit, Steve McIntyre has found yet another unexplainable inclusion of a hockey stick shaped proxy in the PAGES2K paper. What is most interesting about it is that when you look at the proxy plot panel, it reminds … Continue reading →

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Posted in Land use land cover change, Paleoclimatology, Proxies | Tagged , , , , , , , | 90 Comments

Revisiting Temperature Reconstructions used in Climate Change Modeling

Posted on April 16, 2013 by

Guest post by Neil Catto When considering historical temperature reconstruction there are three areas which need further examination; historical instrument readings and adjustments for UHI, tree-ring proxies, other paleoclimate proxies and ice-core proxies. To predict the future of climate it … Continue reading →

Posted in Climate data, Proxies | 25 Comments

McIntyre finds the Marcott ‘trick’ – How long before Science has to retract Marcott et al?

Posted on March 16, 2013 by

Steve McIntyre has made what I can only describe as a stunning discovery as to why there is a sharp uptick in the main Marcott et al graph being touted by the media from its publication in Science. It seems … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology, Proxies | Tagged , | 253 Comments

Marcott’s proxies – 10% fail their own criteria for inclusion

Posted on March 13, 2013 by

Note: Steve McIntyre is also quite baffled by the Marcott et al paper, finding it currently unreproducible given the current information available. I’ve added some comments from him at the bottom of this post – Anthony Guest Post by Willis … Continue reading →

Posted in Proxies | Tagged , , , , , , | 128 Comments

New paper from Markonis and Koutsoyiannis shows orbital forcings signal in proxy and instrumental records

Posted on November 4, 2012 by

Climatic Variability Over Time Scales Spanning Nine Orders of Magnitude: Connecting Milankovitch Cycles with Hurst–Kolmogorov Dynamics Yannis Markonis • Demetris Koutsoyiannis Received: 9 November 2011 / Accepted: 15 October 2012 DOI 10.1007/s10712-012-9208-9 Abstract We overview studies of the natural variability … Continue reading →

Posted in Paleoclimatology, Proxies | Tagged , | 116 Comments

A Big Picture Look At “Earth’s Temperature” – Peter Gleick Edition

Posted on June 10, 2012 by

By WUWT regular “Just The Facts” I recently came across a January 21st, 2012 Peter Gleick article 2011 Climate Change in Pictures and Data: Just the Facts, which appears to mimic the format and approach of my January 1st, 2012 … Continue reading →

Posted in Alarmism, Antarctic, Arctic, Earth, Fakegate, Global warming, measurement, Oceans, Proxies, Sea ice, Sea level, Sea Surface Temperature, Snow, Temperature | Tagged , , , , , , , , , , , | 148 Comments

Another day, another Central Asian precipitation study finds a link to solar activity

Posted on May 15, 2012 by

From Sun and Liu 2012: all of the deep solar minima of the last millennium (Oort, Wolf, Spörer, Maunder and Dalton) correspond to periods of drought in the Qilian Mountains of the northeastern Tibetan Plateau according to this tree-ring study. … Continue reading →

Posted in Paleoclimatology, Proxies, Solar | Tagged , , , , , , , | 56 Comments

A Big Picture Look At “Earth’s Temperature” – Quarterly Update

Posted on April 15, 2012 by

By WUWT regular “Just The Facts” This format received a positive response in the previous article and apparently encouraged Skeptical Science to take A Big Picture Look at Global Warming, thus this article will be updated on a quarterly basis … Continue reading →

Posted in Alarmism, Antarctic, Arctic, Climate data, Climate_change, Global warming, measurement, Oceans, Proxies, Sea ice, Sea level, Sea Surface Temperature, Snow, Uncategorized | Tagged , , , , , , , , | 90 Comments

Shakun The Last, I Hope

Posted on April 11, 2012 by

Guest Post by Willis Eschenbach In three previous posts here, here, and here, I discussed problems with the paper by Shakun et al., “Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation” (PDF,hereinafter S2012) Commenters said, and … Continue reading →

Posted in Paleoclimatology, Proxies | Tagged , , , , , , , , | 84 Comments

Shakun, Not Stirred, and Definitely Not Area-Weighted

Posted on April 9, 2012 by

I’d like to highlight one oddity in the Shakun et al. paper, “Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation” (Shakun2012), which I’ve discussed here and here. They say: The data were projected onto a 5°x5° grid, … Continue reading →

Posted in Antarctic, Arctic, Paleoclimatology, Proxies | Tagged , | 164 Comments

Shakun Redux: Master tricksed us! I told you he was tricksy!

Posted on April 7, 2012 by

Guest Post by Willis Eschenbach The quote above is from Lord of the Rings, an exchange between Gollum and Smeagol, and it encapsulates my latest results from looking into the Shakun 2012 paper, “Global warming preceded by increasing carbon dioxide … Continue reading →

Posted in Alarmism, Antarctic, Carbon dioxide, Paleoclimatology, Proxies | Tagged , , , , , , , | 338 Comments

A reply to Shakun et al – Dr. Munchausen Explains Science By Proxy

Posted on April 6, 2012 by

Guest Post by Willis Eschenbach There’s a new study entitled “Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation”, Shakun et al. (paywalled, hereinafter Shakun2012). The paper claims to show that in the warming since the last … Continue reading →

Posted in Alarmism, Paleoclimatology, Proxies | Tagged , , , , , , , , | 193 Comments