The Sheep Mountain CA bristlecone site is the most important proxy in MBH and the MBH98 reconstruction actually doesn’t differ very much from the Sheep Mountain tree ring chronology (other than it ends in 1980 at pretty much the peak of the Sheep Mt chronology and doesn’t include the downtick in the 1980s.) Various efforts […]
Thanks to Leif Svalgaard for his continuing support of Svalgaard discussion, which is continued here (preceded by #2 here) and #1 here. Continued here.
David Holland’s FOI request for the Review Comments on IPCC AR4 Chapter 6 (Paleoclimate) has been successful, leading to David obtaining the comments, such as they are, which have now been placed online at CA here (though not yet at IPCC.) David Holland’s request was noted up here; last year, we noted the appalling response […]
Hansen et al 1988 reported that they expected extra warming in the SE United States, a theme that was mentioned in his testimony in Washington in summer 1987. Hansen et al 1988 stated: there is a tendency in the model for greater than average warming in the southeastern and central U.S. and relatively cooler or […]
Hansen et al 1988 noted very sensibly that there were radically different approaches to some physical problems in GCMs and looked forward to the “real world laboratory in the 1990s” providing empirical information on these conundrums. One such conundrum were temperatures offshore Antarctica. They noted that their model showed a strong warming trend in sea […]
During our discussions of the differences between Hansen Scenarios A and B – during which the role of CFCs in Scenario A gradually became clearer – the absence of a graph clearly showing the allocation of radiative forcing between GHGs stood out rather starkly to me. When Gavin Schmidt re-visited the topic in May 2007, […]
I happened across a NOAA internal training manual a couple of weeks ago that contained a photo of a USHCN official climate station that I thought I’d never get a photo of. The Baltimore Customs House. Baltimore USHCN station circa 1990’s photo courtesy NOAA, click for more images What is interesting about this station, is […]
On January 16, 2008, I posted a note on Hansen et al 1988 containing the following graphic comparing the three Hansen scenarios to the most recent GISS and RSS temperature versions. . Although there had been much furore in the past about the differences between Hansen Scenarios A and B in previous controversy, I observed […]
Craig Loehle has responded to various criticisms and issued a correction here, which he asked me to note. He states that: the original and correction are pasted together. It has data, urls, a map, proper confidence intervals and hypothesis tests, and corrections to dating issues Gavin found He states that “the shape of the curve […]
Update: see further discussion here NOAA has a webpage on radiative forcing here, which includes a list of equations relating GHG concentrations to radiative forcing, substantially identical to the expressions in TAR. Below is a figure showing, on the left, the graphic at NOAA illustrating their calculation and, on the right, my emulation of this […]
Climate Audit 