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Effect of Radiative Cooling on Cloud-SST Relationship within the Tropical Pacific RegionA recent analysis found a negative correlation between the area-mean cloud amount and the corresponding mean Sea Surface Temperature (SST) within the cloudy areas. The SST-cloud relation becomes more evident when the SST contrast between warm pool and surrounding cold pool (DSST) in the tropical Pacific is stronger than normal. The above feature is related to the finding that the strength of subsidence over the cold pool is limited by radiative cooling because of its small variability. As a result, the area of radiatively-driven subsidence must expand in response to enhanced low-boundary forcing due to SST warming or enhanced basin-scale DSST. This leads to more cloud free regions and less cloudy regions. The increased ratio of cloud-free areas to cloudy areas leads to more high SST areas (>29.50C) due to enhanced solar radiation.
Document ID
20000086612
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Sui, Chung-Hsiung (NASA Goddard Space Flight Center Greenbelt, MD United States)
Ho, Chang-Hoi (Seoul National Univ. Korea, Republic of)
Chou, Ming-Dah (NASA Goddard Space Flight Center Greenbelt, MD United States)
Lau, Ka-Ming (NASA Goddard Space Flight Center Greenbelt, MD United States)
Li, Xiao-Fan (NASA Goddard Space Flight Center Greenbelt, MD United States)
Einaudi, Franco
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Environment Pollution
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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