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Moisture and Precipitation Evolution during Tropical Cyclone Formation as Revealed by the SSM/I–SSMIS Retrievals
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2016
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Source: Journal of the Atmospheric Sciences, 73(7), 2773-2781
[PDF-629.60 KB]
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Journal Title:Journal of the Atmospheric Sciences
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Description:The simultaneous precipitation and column water vapor retrievals from the SSM/I and SSMIS passive microwave instruments were used to examine the convective and moisture evolution during tropical cyclone formation. Using a wave-pouch-track dataset, composites of precipitation and column water vapor were constructed with more than 2000 satellite overpasses for a 3-day time period prior to genesis. It was found that high column water vapor occurs near the pouch center and starts to increase about 42 h prior to genesis while a substantial increase in precipitation occurs within 24 h prior to genesis. These features are consistent with a recently proposed two-stage conceptual model for tropical cyclone formation, in which gradual moisture preconditioning precedes an abrupt transition to sustained deep convection leading up to genesis.
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Source:Journal of the Atmospheric Sciences, 73(7), 2773-2781
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ISSN:0022-4928;1520-0469;
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Rights Information:Other
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