There’s a USHCN station out there, in the “ass end of nowhere”. Apologist Eli Rabett (Joshua Halpern) recently lamented that in order for dendrochronologists to update tree ring studies used in MBH98/99 (aka Mann’s Hockey Stick) that they “have to drive out to the ass end of nowhere”. It’s such an inconvenience for those that […]
Here is a script for collating Loehle proxies into an R-list in which each item is a table with two columns – one the AD year and the other the temperature (except for Holmgren where it is a native value as temperatures were not estimated in the underlying article.) This has not been coordinated with […]
Continuation of Exponential Growth # 2.
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 […]
Here is an interesting exchange at the House Energy and Commerce Subcommittee hearings about the provenance of the hockey stick diagram in An Inconvenient Truth. Thanks to the reader who spotted this. Rep Stearns took aim at the apparent use of Mann’s Hockey Stick in Inconvenient Truth (the methodology of which had been severely criticized […]
Continuation of Unthreaded #24
This post contains an important calculation, which will affect the many multiproxy studies in which Graybill bristlecone chronologies impact results either directly or via Mann’s PC1. Hans Erren has digitized the data from the Ababneh Thesis. In Figure 1 below, I’ve shown the difference between the updated Sheep Mountain chronology and the Graybill chronology. The […]
Previous post (link). A follow-up post (link) If someone felt that it was necessary to detrend the bristlecone pine-based PC1 of Mann’s AD1000 network for CO2 fertilization, it’s doubtful that the initial instinct would be to coerce the data to a network of northern Canadian-Alaskan tree ring chronologies where the possibility of regional differences must […]
We’ve all had enough experience with the merry adjusters to know that just because someone “adjusts” something doesn’t necessarily mean that the adjustment makes sense. A lot of the time, the adjuster arm waves through the documentation and justification of the adjustment. Today I’m going to work through aspects of one of the most problematic […]
As I mentioned before, Hans Erren’s digitization of the Ababneh Sheep Mountain data has prompted me to pick up the MBH files to re-examine the vexed matter of Mann’s CO2 “adjustment”. Each step is fraught with problems. I’m going to try to pull something together listing the steps in the adjustment and the issues involved […]
Climate Audit 