суббота, 13 августа 2011 г.

Storm tracks are heading for the poles, satellite data suggests

Mid-latitude storm tracks are major weather patterns that account for the majority of precipitation in the globe's middle latitudes, which includes most of the heavily populated areas of North America, Eurasia, and Australia. Due to atmospheric circulation and the dynamics of weather systems, these bands of low pressure form repeatedly in the same locations. Apart from being meteorologically important, they’re also major players on the climate scene—clouds in these regions are responsible for reflecting much of the incoming solar radiation that is bounced back to space before penetrating Earth’s atmosphere.

Many climate models have predicted that the positions of these storm tracks would slowly migrate toward the poles, but so far this trend had not been detected. However, analysis of 25 years worth of data from the International Satellite Cloud Climatology Project now indicates that this shift is probably already taking place.

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