In the first major paper of its kind, the researchers used elaborate computer programs that simulate the climate to analyze whether the rise in severe rainstorms, heavy snowfalls and similar events could be explained by natural variability in the atmosphere. They found that it could not, and that the increase made sense only when the computers factored in the effects of greenhouse gases released by human activities like the burning of fossil fuels.
The paper covers climate trends from 1951 to 1999 and therefore does not include any analysis of last year's extreme precipitation, including catastrophic floods in Pakistan, China and Australia as well as parts of the United States, including Tennessee, Arkansas and California.[Emphasis added].
Indeed, an increase of weather extremes has been a fundamental prediction of climate science for decades. Basic physics suggests that as the earth warms, precipitation extremes will become more intense, winter and summer, simply because warmer air can carry more water vapor. Weather statistics confirm that this has begun to happen.
For more, see Heavy Rains Linked to Humans by , February 16, 2011 at NYTimes.com.
No comments:
Post a Comment