[asa] Climate change not all man-made, NOAA report says

From: Dave Wallace <wmdavid.wallace@gmail.com>
Date: Thu Apr 02 2009 - 10:17:37 EDT


Interesting but maybe an April Fools story, but I doubt it.

> It's wrong to blame our warming climate on human pollution alone, says
> a major analysis by U. S. climate scientists who say North America's
> warming and drying trend also has important natural causes.
> Natural shifts in ocean currents have caused much of the warming in
> recent decades, and almost all of the droughts, says the U. S.
> National Oceanic and Atmospheric Administration (NOAA).
> Most climate researchers today deal exclusively with man-made
> "greenhouse" gases, and often dismiss suggestions of naturally caused
> warming as unscientific.
> Yet NOAA says Western Canada has warmed by two degrees and Eastern
> Canada hasn't warmed at all because flows of air from naturally
> shifting Pacific currents have affected the West most.
> The lengthy re-analysis of climate data doesn't dispute that
> greenhouse gases from fossil fuels cause a warmer climate. But it
> raises questions about the details: How much warming? How many causes?
> And why isn't it the same every-where?
> It also stresses that we don't understand climate as well as we like
> to think, because scientists only have good data from about 1948 onward.
Maybe some of the regional variations explain some of Glen's data on
tree rings, although I have not had time to follow Glen's posts in any
detail as I have been down with pneumonia.

Dave W

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Received on Thu Apr 2 10:22:59 2009

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