20 Oct '11, 6pm

Skeptic Talking Point Melts Away as an Inconvenient Physicist Confirms Warming:

These papers do not address causation. What they do is reduce the uncertainty on the instrumental temperature computation and extend the record back to 1800. This can provide us higher confidence that prior reports of global warming were accurate and that we presently live during a somewhat exceptional period of warming. However, the present work does not attempt to explain why we are warming. On a personal level I have high confidence in the greenhouse gas forcing model, but that opinion is based on the accumulated efforts of other people in other areas, and has little to do with the present work. I do find it interesting to compare the magnitude of largest presumptively natural temperature fluctuation during the last 200 years, the 1810s negative excursion, to the recent temperature changes. The 1810s temperature drop, including the “year without a summer” in Europe in 1...

Full article: http://dotearth.blogs.nytimes.com/2011/10/20/skeptic-talk...

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