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| Titel |
Rain area delineation by means of multispectral cloud characterization from satellite |
| VerfasserIn |
F. Torricella, E. Cattani, V. Levizzani |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 9th EGU Plinius Conference on Mediterranean Storms (2007) ; Nr. 17 (2008-06-20), S.43-47 |
| Datensatznummer |
250013623
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| Publikation (Nr.) |
 copernicus.org/adgeo-17-43-2008.pdf |
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| Zusammenfassung |
| The identification of precipitation areas by microwave based rain algorithms
can be improved by means of cloud classification schemes based on
multispectral observations. Several recent studies have demonstrated the
potential of cloud microphysical and optical characterization for the
improvement of passive microwave rain estimates, especially in detecting
likely precipitating pixels over land. The multispectral sensing
capabilities of MODIS onboard Aqua are exploited to characterize the cloudy
scenario, using a twofold approach: a) an RGB technique to qualitatively
identify the different cloud systems on the basis of the combination of
radiances measured in three selected channels, and b) a quantitative
description of cloud top in terms of optical thickness (τ), effective
radius (Re) and top temperature (Tc). The information gathered by
the multispectral analysis of the cloud field from MODIS is contrasted with
the rain intensity at the ground as derived from the AMSR-E operational
algorithm, to assess the statistical relationships between microphysical
parameters and the rain intensity for such nearly simultaneous and
co-located observations. |
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