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Drought warning as the tropics expand http://apocadocs.com/s.pl?1233597087
California's governor, Arnold Schwarzenegger, warned on Thursday that his state "is headed toward one of the worst water crises in its history".
Now new research suggests that the three-year drought in the Golden State may be a consequence of the expanding tropics, which are gradually growing as human emissions of greenhouse gases warm the planet....the simplest and most easily tracked characteristic of the tropics lies high above, at the boundary between the troposphere, where weather systems form, and the stratosphere above it.
Over the tropics, the tropopause, as this boundary is known, tends to lie several kilometres higher up in the atmosphere. The change in altitude is relatively easy to measure. "It is much more difficult to detect significant changes in the lower levels of the atmosphere and surface rainfall pattern," says Jian Lu of the US National Center for Atmospheric Research in Colorado.
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Your Quips:
katydidnt says: "No, tropopause is when the high flier trapeze lady pauses mid-air just before she makes it back to the swing."
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'Doc Michael says:
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The "tropopause"... Is that when the troposphere experiences menopause?
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