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Titel |
Explaining darker deep convective clouds over the western Pacific than over tropical continental convective regions |
VerfasserIn |
B.-J. Sohn, M.-J. Choi, J. Ryu |
Medientyp |
Artikel
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Sprache |
Englisch
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ISSN |
1867-1381
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Digitales Dokument |
URL |
Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 11 ; Nr. 8, no. 11 (2015-11-02), S.4573-4585 |
Datensatznummer |
250116671
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Publikation (Nr.) |
copernicus.org/amt-8-4573-2015.pdf |
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Zusammenfassung |
This study attempted to explain why deep convective clouds (DCCs) over the
western Pacific are generally darker than those found over tropical African
and South American land regions. The western Pacific domain was further
divided into its land and ocean regions to deduce the general differences in
DCC characteristics between convectively active tropical land and ocean
regions. DCC in this study is defined as a single-layer cloud whose
thickness is greater than 15 km, and it is determined from CloudSat-measured
reflectivity profiles. Corresponding MODIS-measured reflectivities at 0.645 μm
were examined, along with the analysis of cloud products from Cloud
Aerosol Lidar Infrared Pathfinder Satellite Observation (CALIPSO)
measurements.
From an analysis of the four January months of 2007–2010, a distinct
difference in ice water path (IWP) between the ocean region of the western
Pacific and the three tropical land regions was revealed. Distinct
differences in the effective radius between land and ocean were also found.
The findings lead to a conclusion that smaller IWP over the western Pacific
ocean region than over the tropical land regions, which should be caused by
different cloud microphysics between land and ocean, is the main cause of
smaller reflectivity there. |
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