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Detailed Reference Information |
Read, W.G., Wu, D.L., Waters, J.W. and Pumphrey, H.C. (2004). Dehydration in the tropical tropopause layer: Implications from the UARS Microwave Limb Sounder. Journal of Geophysical Research 109: doi: 10.1029/2003JD004056. issn: 0148-0227. |
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Measurements of H2O from the Microwave Limb Sounder (MLS) on the Upper Atmosphere Research Satellite (UARS) are used to investigate the structure of H2O in the near tropopause region and dehydration mechanisms in the tropical tropopause layer (TTL). The new MLS data are consistent with convective input of H2O into the bottom of the TTL followed by slow ascent with a maximum relative amplitude in the seasonal cycle occurring near the tropopause nearly in phase with the tropopause temperature seasonal cycle. The relative amplitude of the seasonal cycle shows a minimum at 121 hPa in the upwelling moist phase. These features are reproduced with the cold-trap dehydration hypothesis. Seasonal maps show wettest tropical 100 hPa H2O colocated with continental convection. |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Meteorology and Atmospheric Dynamics, Stratosphere/troposphere interactions, Meteorology and Atmospheric Dynamics, Convective processes, Meteorology and Atmospheric Dynamics, Tropical meteorology, UARS Microwave Limb Sounder water vapor measurements, dehydration in the tropical tropopause layer, seasonal evolution of water vapor in the upper troposphere/lower stratosphere |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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