Lonnie Thompson has done a much better job of archiving data for his recent update Quelccaya – see NOAA here – both in terms of information and promptness. Quelccaya is familiar territory for Thompson as it was the location of his first tropical ice cores (1983) and his first publication of this type. Thompson published […]
While CA readers may disagree with Tom Curtis, we’ve also noticed that he is straightforward. Recently, in comments responding to my recent post on misrepresentations by Lewandowsky and Cook, Curtis agreed that “Lewandowsky’s new addition to his paper is silly beyond belief”, but argued that “the FOI data does not show Cook to have lied […]
Q. Why did realclimate publish the Marcott FAQ on Easter Sunday? A. Because if they’d waited until Monday, everyone would have thought it was an April Fools’ joke.
Marcott et al have posted their long-promised FAQ at realclimate here. Without providing any links to or citation of Climate Audit, they now concede: 20th century portion of our paleotemperature stack is not statistically robust, cannot be considered representative of global temperature changes, and therefore is not the basis of any of our conclusions. Otherwise, […]
Bobbie Hasselbring, editor of Real Food Traveller, has an article on “Aging as a State of Mind”. Her article concludes as follows: Katherine McIntyre is 89 years old. She’s the oldest person ever to have zip lined at High Life Adventures. She’s a working travel journalist. And she kept me from even wondering whether I’m […]
Last fall, Geoff Chambers and Barry Woods established beyond a shadow of a doubt that no blog post linking to the Lewandowsky survey had ever been published at the Skeptical Science (SKS) blog. Chambers reasonably suggested at the time that the authors correct the claim in the article to reflect the lack of any link […]
In today’s post, I’m going to show Marcott-Shakun redating in several relevant cases. The problem, as I’ve said on numerous occasions, has nothing to do with the very slight recalibration of radiocarbon dates from CALIB 6.0.1 (essentially negligible in the modern period in discussion here), but with Marcott-Shakun core top redating.
As noted in my previous post, Marcott, Shakun, Clark and Mix disappeared two alkenone cores from the 1940 population, both of which were highly negative. In addition, they made some surprising additions to the 1940 population, including three cores whose coretops were dated by competent specialists 500-1000 years earlier. While the article says that ages […]
Marcott, Shakun, Clark and Mix did not use the published dates for ocean cores, instead substituting their own dates. The validity of Marcott-Shakun re-dating will be discussed below, but first, to show that the re-dating “matters” (TM-climate science), here is a graph showing reconstructions using alkenones (31 of 73 proxies) in Marcott style, comparing the […]
I’m working towards a post on the effect of Marcott re-dating, but first I want to document some points on the methodology of Marcott et al 2013 and to remove some speculation on the Marcott upticks, which do not arise from any of the main speculations. In the graphic below, I’ve plotted Marcott’s NHX reconstruction […]