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| Titel |
Detection and mapping of polar stratospheric clouds using limb scattering observations |
| VerfasserIn |
C. Savigny, E. P. Ulasi, K.-U. Eichmann, H. Bovensmann, J. P. Burrows |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 5, no. 11 ; Nr. 5, no. 11 (2005-11-16), S.3071-3079 |
| Datensatznummer |
250003150
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| Publikation (Nr.) |
 copernicus.org/acp-5-3071-2005.pdf |
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| Zusammenfassung |
| Satellite-based measurements of Visible/NIR limb-scattered solar
radiation are well suited for the detection and mapping of polar
stratospheric clouds (PSCs). This publication describes a method
to detect PCSs from limb scattering observations with the Scanning
Imaging Absorption spectroMeter for Atmospheric CartograpHY
(SCIAMACHY) on the European Space Agency's Envisat spacecraft. The
method is based on a color-index approach and requires a priori
knowledge of the stratospheric background aerosol loading in order
to avoid false PSC identifications by stratospheric background
aerosol. The method is applied to a sample data set including the
2003 PSC season in the Southern Hemisphere. The PSCs are
correlated with coincident UKMO model temperature data, and with
very few exceptions, the detected PSCs occur at temperatures below
195–198 K. Monthly averaged PSC descent rates are about 1.5 km/month
for the −50° S to −75° S latitude range
and assume a maximum between August and September with a value of
about 2.5 km/month. The main cause of the PSC descent is the
slow descent of the lower stratospheric temperature minimum. |
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