Category Archives: Proxies

Mining proxies for the Southern Annular Mode

Steve McIntyre writes about what he considers another “completely worthless” exercise in statistical data mining, writing: =============================================================== In today’s post, I will look at a new Naturemag climate reconstruction claiming unprecedentedness (h/t Bishop Hill): “Evolution of the Southern Annular Mode … Continue reading

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Posted in Paleoclimatology, Proxies | 29 Comments

A question about proxies and calibration with the adjusted temperature record

WUWT reader Tom O’Hara writes in a question that seemed worthwhile to discuss. Paleo specialists can weigh in on this. It seems to me that he has a point, but like him, I don’t know all the nuances of calibrating … Continue reading

Posted in Proxies | 102 Comments

Duke Neukom’s Secret Sauce

Guest Post by Willis Eschenbach In my last post, I talked about the “secret sauce”, as I described it, in the Neukom et al. study “Inter-hemispheric temperature variability over the past millennium”. By the “secret sauce” I mean the method … Continue reading

Posted in Paleoclimatology, Proxies | Tagged , , , | 115 Comments

Neukom’s Science By Proxy

Guest Post by Willis Eschenbach Over at Climate Audit, Steve McIntyre is engaged in the slow public defenestration of the latest multi-proxy extravapalooza, a gem of a paper yclept “Inter-hemispheric temperature variability over the past millennium” by Neukom et al, … Continue reading

Posted in Bad science, Proxies | Tagged , , , , , | 48 Comments

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

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

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

Revisiting Temperature Reconstructions used in Climate Change Modeling

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?

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

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

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

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

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

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

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

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!

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

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