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The observed variation in cloud-induced longwave radiation in response to sea surface temperature over the Pacific warm pool from MTSAT-1R imagery

Title
The observed variation in cloud-induced longwave radiation in response to sea surface temperature over the Pacific warm pool from MTSAT-1R imagery
Authors
Cho H.Ho C.-H.Choi Y.-S.
Ewha Authors
최용상
SCOPUS Author ID
최용상scopus
Issue Date
2012
Journal Title
Geophysical Research Letters
ISSN
0094-8276JCR Link
Citation
vol. 39, no. 17
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
This study investigated variations in outgoing longwave radiation (OLR) in response to changes in sea surface temperature (SST) over the Pacific warm pool area (20°N-20°S, 130°E-170°W). OLR values were obtained from recent (January 2008-June 2010) geostationary window channel imagery at hourly resolution, which resolves processes associated with tropical convective clouds. We used linear regression analysis with the domain-averaged OLR and SST anomalies (i.e., δOLR, δSST; deviations from their 90-day moving averages). Results show that the regression slope appears to be significant only with SST least-affected by cloud radiative forcing, for which SST needs to be obtained as daily average over cloud-free regions (δSSTclear). The estimated value of δOLR/δSSTclear is 15.72 W m -2 K -1, indicating the presence of strong outgoing longwave radiation in response to surface warming. This atmospheric cooling effect is found to be primarily associated with reduced areal coverage of clouds (-14.4% K -1). © 2012. American Geophysical Union.
DOI
10.1029/2012GL052700
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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