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Yearly Archives: 2006
Ou: Bounds on the Earth's Surface Temperature
Jun 17, 2006 – 3:22 PM
Ou (J Clim 2001), " Possible Bounds on the Earth’s Surface Temperature" is an attempt to explain why a climate “not unlike the present-day one has prevailed on the earth since its early history when the sun was considerably dimmer”, a question that Lee was musing about and, IMHO, an interesting question. The tricky thing […]
More on Bürger et al 2006
Jun 17, 2006 – 7:11 AM
A few days ago, I mentioned that I thought that Bürger et al 2006, while recognizing the linear relationship between MBH proxies and their RPCs, had incorrectly formulated the form of the relationship as the form of the linear relationship was inconsistent with my own derivation, which I had cross-checked and verified against source code […]
MBH and Partial Least Squares
Jun 13, 2006 – 8:35 AM
Right now, I’m working on two main projects where I intend to produce papers for journals: one is on the non-robustness of the “other” HS studies; the other is on MBH98 multivariate methods. The latter topic is somewhat “in the news” with the two Bürger articles and with the exchange at Science between VZ and […]
Some New Tree Rings in Alberta
Jun 12, 2006 – 1:12 PM
8 new tree ring measurement data sets have archived this week at WDCP in northern Alberta by Meko. The sites are around 58N, 111W , well to the northeast of the Jasper site (52N, 117W) which is used in nearly all the multiproxy studies. I did a “standard” type chronology fitting negative exponential curves by […]
LIA and MWP in Venezuela
Jun 11, 2006 – 6:46 AM
Eduardo Zorita sent me an interesting paper (Pollissar et al 2006, Solar modulation of Little Ice Age climate in the tropical Andes) hot off the press on June 1, 2006, co-authored by Bradley, which reported: The intersection of the ELA [equilibrium line altitude] and pollen estimates indicate that during the LIA the Venezuelan Andes were […]
Polar Urals Update and Jones et al 1998
Jun 9, 2006 – 9:38 AM
I showed a little while ago the impact of the Polar Urals update on the Briffa 2000 reconstruction – using it instead of the Yamal substitution resulted in an MWP index higher than the 20th century. Today I’ve done the same calculation for Jones et al 1998, this time substituting the Polar Urals update using […]
More on Mongolia
Jun 8, 2006 – 9:30 PM
Rob Wilson wrote in today pointing out that D’Arrigo et al 2006 had obtained a correlation to gridcell temperature of 0.58 for the Jacoby Mongolia site chronology, working from original data and not relying on hand-me-down data from Mann and Jones. This is actually higher than the 0.25 reported by Mann and Jones for annual […]
Another blog update
Jun 8, 2006 – 5:46 PM
As a test, a couple of changes have been made to the blog as a result of some pathetic pleading by our commentators: 1. If you cast your eyes to the right hand side, you will see that the recent comments are sorted into threads. This is to prevent one popular thread from flooding the […]
Climate Audit 
A few inconvenient truths
John A thought that it would be worthwhile to draw attention to some articles on scientific reaction to Al Gore’s film "An Inconvenient Truth". and started this post. I have kept his links and quotations, but otherwise re-written this post. I haven’t seen Al Gore’s film and may comment on it myself later. I suspect […]