%0 Journal Article
%A Ungermann, Jörn
%A Bartolome, Irene
%A Grießbach, Sabine
%A Spang, Reinhold
%A Rolf, Christian
%A Krämer, Martina
%A Höpfner, Michael
%A Riese, Martin
%T Cirrus cloud shape detection by tomographic extinction retrievals from infrared limb emission sounder measurements
%J Atmospheric measurement techniques discussions
%V  
%@ 1867-8610
%C Katlenburg-Lindau
%I Copernicus
%M FZJ-2020-03174
%P 2020-256
%D 2020
%X 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 example for a synthetic study, the new cloud index method is better in detecting the horizontal cloud extent 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 show even an improvement of 60 %. In a second step, the extinction retrieval is applied to real 3-D measurements of the air-borne limb sounder GLORIA taken during the Wave-driven ISentropic Exchange (WISE) campaign to retrieve small-scale cirrus clouds with high spatial accuracy.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.5194/amt-2020-256
%U https://juser.fz-juelich.de/record/884282