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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
Geophysical Research Letters vol. 39, no. 17
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
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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