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Cirrus cloud shape detection by tomographic extinction retrievals from infrared limb emission sounder measurements

Ungermann, Jörn; Bartolome, Irene; Griessbach, Sabine; Spang, Reinhold; Rolf, Christian; Krämer, Martina; Höpfner, Michael; Riese, Martin

Abstract:
An improved cloud-index-based method for the detection of clouds in limb sounder data is presented that exploits the spatial overlap of measurements to more precisely detect the location of (optically thin) clouds. A second method based on a tomographic extinction retrieval is also presented. Using CALIPSO data and a generic advanced infrared limb imaging instrument as examples for a synthetic study, the new cloud index method has a better horizontal resolution in comparison to the traditional cloud index and has a reduction of false positive cloud detection events by about 30 %. The results for the extinction retrieval even show an improvement of 60 %. In a second step, the extinction retrieval is applied to real 3-D measurements of the airborne Gimballed Limb Observer for Radiance Imaging in the Atmosphere (GLORIA) taken during the Wave-driven ISentropic Exchange (WISE) campaign to retrieve small-scale cirrus clouds with high spatial accuracy.


Verlagsausgabe §
DOI: 10.5445/IR/1000127940
Veröffentlicht am 22.12.2020
Originalveröffentlichung
DOI: 10.5194/amt-13-7025-2020
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1867-8548
KITopen-ID: 1000127940
HGF-Programm 12.04.03 (POF III, LK 01) Stratospheric Ozone and Climate Change
Erschienen in Atmospheric measurement techniques
Verlag Copernicus Publications
Band 13
Heft 12
Seiten 7025–7045
Vorab online veröffentlicht am 21.12.2020
Schlagwörter Limb-sounder, Cirrus, Infrared, Remote sounding
Nachgewiesen in Dimensions
Web of Science
Scopus
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