Abrupt changes

US Geological Survey Report – U.S. Climate Change Science Program. Thresholds of Climate Change in Ecosystems

By Bruce Melton PEAbrupt changes, Impacts, Shifting Ecology

(170 pages) Ecological thresholds occur when external factors, positive feedbacks, or nonlinear instabilities in a system cause changes to propagate in a domino-like fashion that is potentially irreversible. Atmospheric carbon dioxide has reached levels unprecedented in possibly the last 24 million years. CO2 concentrations have risen by 34%, mostly in the last several decades. Global…

January 6, 2009

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Climate Collapse is Real – The Venus Syndrome

By Bruce Melton PEAbrupt changes, The Unexpected

James Hansen, Director of the NASA Goddard Space institute – the foremost US Government climate modeling agency – gave a presentation at the American Geophysical Union annual meeting in San Francisco last week (16,000 scientists attended the annual festivities). The rate of CO2 change today is 20,000 times higher than at any time in the…

December 22, 2008

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Remember, average global warming over land is double the global average because of the cooling influence of our oceans and ice sheets, or 3.56 degrees C in December (6.4 F). and the average over the arctic is four times the global average or 7.12 C (12.8 F). Importantly, the increase in extreme temperature is far greater than the average, and extreme weather increases nonlinearly because of the basics of heat and energy physics, where a little warming does not create a little more extremeness in the weather, it creates a lot more.

US Geological Survey Report – U.S. Climate Change Science Program. Thresholds of Climate Change in Ecosystems

Climate Collapse is Real – The Venus Syndrome

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