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Article: Water Vapor-Induced OLR Variations Associated with High Cloud Changes over the Tropics: A Study from Meteosat-5 Observations
- Article from:
- Journal of Climate
- Article date:
- May 15, 2004
- Author:
CopyrightCopyright American Meteorological Society May 15, 2004. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Subdividing the Indian Ocean domain into three areas: (i) a moist cloudy area due to tropical deep convection, (ii) a moist clear area fed by the evaporation of hydrometeors from adjacent high clouds, and (iii) a dry area represented by descending air over the subtropics, the relationships between upper-tropospheric humidity over these three areas and tropical convections are examined using the European Geostationary Meteorological Satellite (Meteosat-5) observations. It is observed that the clear dry area shrinks and becomes drier in response to expansion of the cloudy area in the Tropics and vice versa. This change in upper-tropospheric humidity over the subtropics appears to ...