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Global Warming Makes Heat Waves More Likely, Study Finds

by Justin Gillis of The New York Times

July 10, 2012

Some of the weather extremes bedeviling people around the world have become far more likely because of human-induced global warming, researchers reported on Tuesday. Yet they ruled it out as a cause of last year’s devastating floods in Thailand, one of the most striking weather events of recent years.

A new study found that global warming made the severe heat wave that afflicted Texas last year 20 times as likely as it would have been in the 1960s. The extremely warm temperatures in Britain last November were 62 times as likely because of global warming, it said.

The findings, especially the specific numbers attached to some extreme events, represent an increased effort by scientists to respond to a public clamor for information about what is happening to the earth’s climate. Studies seeking to discern any human influence on weather extremes have usually taken years, but in this case, researchers around the world managed to study six events from 2011 and publish the results in six months.

Some of the researchers acknowledged that given the haste of the work, the conclusions must be regarded as tentative.

Continue reading the article at The New York Times.