Global warming of last 50 years “unusual” in at least the previous 1300 years

Fri, 2007-02-02 13:14Bill Miller
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Global warming of last 50 years “unusual” in at least the previous 1300 years

The long-awaited IPCC report said a warming of about 0.2 degrees Centigrade per decade is projected for the next two decades. Even if greenhouse-gas and aerosol concentrations had been kept constant at 2000 levels, further warming of about 0.1 degrees Centigrade per decade would be expected.

Warming is expected to be greatest over land and at high northern latitudes, the report said, and least over the Southern Ocean and parts of the North Atlantic.

Even if greenhouse-gas concentrations were stabilized, warming and sea-level rise would continue for centuries due to “the timescales associated with climatic processes and feedbacks.”

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Problems caused by climate change are likely already dangerous and global warming may be irreversible, according to a draft science report by a United Nations committee.

The Intergovernmental Panel of Climate Change (IPCC) report, leaked earlier this week to a number of major media organizations, said continued greenhouse gas emissions caused primarily by burning oil, coal and natural gas will probably increase the likelihood of  “severe, pervasive and irreversible impacts for people and ecosystems.”

The New York Times...

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