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Warming by about 0.15 C per decade
From
A new paper authored by Anthony Watts, et al as part of the Berkley Earth Surface Temperature Project (BEST) (being submitted for publication) has now shown that the temperature guage site metadata (information about site changes like urban development, site moves, etc) used by NOAA and NASA's GHCN and resulting data adjustments overcompensated on high quality rural sites and undercompensated on poor quality urban sites, leading to overmodification of the temperature record, thus falsely showing a 0.308 C warming since 1979, when a new site rating methodology now shows the actual warming since 1979 has only been 0.15 C. Note the old, incorrect, exaggerated warming of 0.308 C has consistently been shown to be roughly half of the amount of warming predicted by the best computer climate models used by NOAA, NASA, and CRU to produce their predictions for the UN's IPCC report.
Anthony Watts, President, IntelliWeather, Chico, CA, USA
Evan Jones, IntelliWeather, Chico, CA, USA
Stephen McIntyre, Toronto, Canada
John R. Christy, Department of Atmospheric Science, University of Alabama, Huntsville, AL, USA
NY Times has an article by co-author physicist Richard Muller There seem to be at least two Berkeley Earth teams.
Call me (Richard Muller) a converted skeptic. Three years ago I identified problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming. Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct. I’m now going a step further: Humans are almost entirely the cause.
See more and subscribe to NextBigFuture at 2012-07-30 10:52:08 Source: http://nextbigfuture.com/2012/07/warming-by-about-015-c-per-decade.html
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