I’ve been re-examining SH proxies for some time now, both in connection with PAGES2K and out of intrinsic relevance. In today’s post, I’ll report on a new (relatively) high-resolution series from the Arabian Sea offshore Pakistan (Boll et al 2014, Late Holocene primary productivity and sea surface temperature variations in the northeastern Arabian Sea: implications […]
Julien Emile-Geay has made many forceful criticisms of the Loehle reconstruction. For example, he says: Relationship of each proxy to *local* temperature is not even discussed. We are just shoved a list of references (hey Craig , have you heard of tables ? They are a great means that scientists use to convey information clearly). […]
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 […]
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 […]
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 – […]
It’s a dangerous practice to let your eye get teased into visual comparisons, but I was struck by a comparison between the G Bulloides series from the Arabian Sea (which is an upwelling proxy) and Stott’s Warm Pool SST proxies.
I’ve written on several occasions about Juckes’ use of cold water G Bulloides as a supposed temperature proxy (following Moberg’s equally indefensible use of this proxy.) It has come to my attention that a leading specialist, David Black of the University of Akron, had already issued a scathing denunciation of Juckes’ use of G Bulloides […]
Last year, when Moberg was published, I pointed out witha slightly arched eyebrow that one of the two most important contributors to any 20th century HS-ness in Moberg was the increasing percentage of subpolar foraminifera (G. Bulloides) in the Arabian Sea – intuitively not a direct indicator of warming. Having visited the foraminifera literature in […]
Several people have written to me about today’s article in Nature by Treydte et al (including Esper) announcing that the 20th century is the wettest period in the millennium. Treydte et al state: Comparison with other long-term precipitation reconstructions indicates a large-scale intensification of the hydrological cycle coincident with the onset of industrialization and global […]
I checked the Lauritzen series sent to me a few days ago by Moberg and found more discrepancies. I originally observed a discrepancy between the figure in the source article and the figure shown in the SI to Moberg et al [2005] as shown below. The graphic in Nature ended in the 1930s, while the […]
Climate Audit 