Thread for discussion of Loehle 2007. I’ll try to comment later but have some other obligations right now. Craig Loehle sneds the following information on provenance: 1) GRIP borehole temperature (Dahl-Jensen et al., 1998): See Moberg Nature site supplementary material [SM – digitized version is at http://data.climateaudit.org/data/moberg/djgrip.dat ) 2) Conroy Lake pollen (Gajewski, 1988): ftp://ftp.ncdc.noaa.gov/pub/data/paleo/pollen/recons/liadata.txt […]
Hans Erren has digitized the Ababneh Sheep Mountain version and I’m going to show some extremely interesting knock-on results both on MBH98-99 and Mann and Jones 2003. I started in on Mann and Jones 2003, partly for a little variety and partly because the Sheep Mountain impact was particularly strong on this network. Before I […]
One of the reasons why scientists have been so quick to use tree ring information despite all the problems is that, for the most part, there is excellent dating control on tree ring chronologies, something which can be problematic in other proxies. Today I want to document some notes on dating the Arabian Sea G […]
As a sort of Methadone replacement for Mann’s bristlecone PC1 (which uses Graybill’s strip bark chronologies), two Esper foxtail chronologies (Upper Wright Lakes and Boreal Plateau) have come into use by the Team. These two chronologies were used separately in the small Esper network (two of only 7 or so medieval chronologies) making a very […]
Here’s something I meant to post up when AR4 came out. I was reminded of this when Rob Wilson posted recently: Lastly, lets not forget that TR based reconstructions of NH temperatures exist that do not use Bristlecone pine or Foxtail data. Rob’s point here is very disingenuous (to use Mann-speak) since millennial reconstructions are […]
Last fall, I discussed information sources on West Greenland ice core series, noting that the West Greenland version attributed by Juckes to Jones et al 1998 was a version that I’d not seen before. While I was looking at the proxy decisions in Juckes et al, I noticed the following intriguing rationalization: The Greenland stack […]
Many climateaudit readers will remember Mann’s “CENSORED” directory, in which Mann calculated principal components on a network that excluded bristlecone pines (which needless to say didn’t have a HS shape. Now Juckes et al introduces us to a new type of climate data: “restricted” data. The Team has introduced a novel data classification system – […]
On Sep 21, 2007, Hugues Goosse, the Climate of the Past editor responsible for the Juckes article, published a statement saying that a revised version of the Juckes et al article had been submitted to “conventional” refereeing and accepted on Sept 21, 2007. He said: On the other hand, the authors disagree with one reviewer […]
As readers of this blog know, Juckes et al submitted a paper for online review at Climate of the Past Discussions. See here for discussion. There were many unsatisfactory and even distasteful aspects to this paper. I submitted a detailed online review, as did Willis Eschenbach and another CA reader. I spent time rebutting a […]
As you know, we are eagerly awaiting the publication of the following article by Wahl and Ammann reported here: Wahl, E and C Ammann (In press). “Robustness of the Mann, Bradley, Hughes reconstruction of northern hemisphere surface temperatures: Examination of criticisms based on the nature and processing of proxy climate evidence.” Climatic Change (accepted). May […]
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