Anthony Watts has a post comparing global average temperature anomaly from 4 major sources. Two of them are surface temperature estimates: GISS (NASA’s Goddard Institute for Space Studies) and HadCRU (the Hadley Centre/Climate Research Unit in the U.K.). The other two are satellite estimates of lower-troposphere temperature, from UAH (University of Alabama at Huntsville) and RSS (Remote Sensing Systems). It’s an interesting thing to compare these data sets, but it’s well to bear in mind that they don’t measure the same thing. The surface data are estimates of actual surface temperature, while the satellite data are for the lower troposphere, i.e., a rather large segment of the lower part of earth’s atmosphere. Nonetheless, we expect these data sets to show strong correlation.
What’s Up With That?
March 2, 2008 · 165 Comments
Categories: Global Warming · climate change
