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| Titel |
Characteristics of cloud liquid water path from SEVIRI onboard the Meteosat Second Generation 2 satellite for several cloud types |
| VerfasserIn |
A. Kniffka, M. Stengel, M. Lockhoff, R. Bennartz, R. Hollmann |
| 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 ; 7, no. 4 ; Nr. 7, no. 4 (2014-04-04), S.887-905 |
| Datensatznummer |
250115689
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| Publikation (Nr.) |
 copernicus.org/amt-7-887-2014.pdf |
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| Zusammenfassung |
| In this study the temporal and spatial characteristics of the liquid water
path (LWP) of low, middle and high level clouds are analysed using
space-based observations from the Spinning Enhanced Visible and Infrared
Imager (SEVIRI) instrument onboard the Meteosat Second Generation 2 (MSG 2)
satellite. Both geophysical quantities are part of the CLAAS (CLoud property
dAtAset using SEVIRI) data set and are generated by EUMETSAT's Satellite
Application Facility on Climate Monitoring (CM SAF). In this article we focus
on the statistical properties of LWP, retrieved during daylight conditions,
associated with individual cloud types. We analysed the intrinsic variability
of LWP, that is, the variability in only cloudy regions and the variations driven
by cloud amount. The relative amplitude of the intrinsic diurnal cycle
exceeded the cloud amount driven amplitude in our analysed cases. Our results
reveal that each cloud type possesses a characteristic intrinsic LWP
distribution. These frequency distributions are constant with time in the
entire SEVIRI field of view, but vary for smaller regions like Central
Europe. Generally the average LWP is higher over land than over sea; in the
case of low clouds this amounts to 15–27% in 2009. The variance of
the frequency distributions is enhanced as well. Also, the average diurnal
cycle of LWP is related to cloud type with the most pronounced relative
diurnal variations being detected for low and middle level clouds. Maps of
the relative amplitude and the local time of maximum LWP show the variation
throughout the SEVIRI field of view. |
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