Here is a puzzling comparison of two zonal averages from Phil Jones’ CRUTEM3 gridded land data. Red shows the average from 20S to 20N and black shows the average of the 20-30S band (both N and S). These are calculated from gridded data at http://hadobs.metoffice.com/crutem3/data/CRUTEM3.nc. I did this comparison because I noticed a difference between […]
At a friend’s request, I went up to northern Ontario this weekend to look at a gold prospect, which I might chat about some time. I got to trudge through bush for a few hours – exhausting work for city folk, drove a quad around empty logging roads (at a grandfatherly pace) – my sons […]
Last week, I wanted to determine what GISS’ tropical land-and-ocean time series was. This did not prove as easy as it sounds. Nothing in GISS is intrinsically complicated – it;s all just averaging and smoothing and adjusting. But the code is written as though the whole thing were being done on a Commodore 64 with […]
A couple of week ago, I noticed that the UK Met Office website contained the following statement Q. Where can I get the raw observations? A. The raw sea-surface temperature observations used to create HadSST2 are taken from ICOADS (International Comprehensive Ocean Atmosphere Data Set). These can be found at icoads.noaa.gov/. To obtain the archive […]
De’ath et al (Science 2009) here SI received a considerable amount of press at the start of 2009. De’ath et al reported that the there was an “unprecedented” decline in Great Barrier Reef coral calcification: The data suggest that such a severe and sudden decline in calcification is unprecedented in at least the past 400 […]
Many CA readers know a lot about regression and quite a bit about principal components, but I dare say that a much fewer number are familiar with Truncated Total Least Squares (to which the regpar parameter belongs.) We’re seeing interesting interactions between PC=k and regpar=r – and there is little, if anything, in regular statistical […]
In his RC post yesterday – also see here – Steig used North et al (1982) as supposed authority for retaining three PCs, a reference unfortunately omitted from the original article. Steig also linked to an earlier RC post on principal components retention, which advocated a completely different “standard approach” to determining which PCs to […]
During the 12-hour interval that Steig deigned to permit comments on his “Tutorial” about principal components, he made the following backhanded criticism of blogger communications with him: [Response: Ryan: Unlike most of your fellow bloggers, you have been very gracious in your communications with me. They could learn something from you. I don’t know how […]
A lengthy feature on doubles squash in today’s Globe and Mail. It’s such a great sport. The match discussed here was at our club’s finals night. For Toronto readers, in the print edition of the paper, they had a wide-angle photo of the spectators in the gallery – I’m just at the edge of the […]
Geert Jan van Oldenburgh of KNMI develops and, in his part time, maintains excellent KNMI’s Climate Explorer. I recommend that Curt Covey of PCMDI examine whether they should abandon their own much less satisfactory access points. Hadley Center as well. The other day, I was interested in deriving a HadISST monthly tropical average. The data […]
Climate Audit 