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Domain filling, forward trajectory calculations are used for this research to examine the global dehydration processes that control stratospheric water vapor. The researchers find that while the Tropical West Pacific is the dominant dehydration location, dehydration over Tropical South America is also important. Antarctica also contributes to the overall stratospheric water vapor budget by releasing very dry air into the Southern Hemisphere stratosphere following the break up of the winter vortex. [Source: Atmospheric Chemistry and Physics Discussions]
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