Cite as:
R&uuml;thrich, F.; Thies, B.; Reudenbach, C. &amp; Bendix, J. (2013): <b>Cloud Detection and Analysis on the Tibetan Plateau using Meteosat and CloudSat.</b>. <i>Journal of Geophysical Research - Atmospheres</i> <b>118</b>, 10082–10099.

Resource Description

Title: Cloud Detection and Analysis on the Tibetan Plateau using Meteosat and CloudSat.
FOR816dw ID: 157
Publication Date: 2013-09-12
License and Usage Rights:
Resource Owner(s):
Individual: Frank Rüthrich
Individual: Boris Thies
Individual: Christoph Reudenbach
Individual: Jörg Bendix
[1] Previous studies of clouds over the Tibetan Plateau (TiP) were subject to limitations. Surface observations are scarce, and satellite retrievals are not well adapted to the peculiar conditions of the TiP. For the most comprehensive existing cloud data set, provided by the International Satellite Cloud Climatology Project (ISCCP), issues were reported for the TiP. It also lacks sufficient spatiotemporal resolution for this topographically complex region. With the Indian Ocean Data Coverage service, European Organisation for the Exploitation of Meteorological Satellites provides a Meteosat data set between 1998 and 2008. The resolution of around 6?km at the study area is sufficient even for complex terrain. Based on this data set and on products of the active sensor onboard CloudSat, we develop a novel gross-cloud retrieval for the TiP using logistic regression models. The approach maintains the original Meteosat resolution. Validation against independent CloudSat data reveals good performance. The approach also outperforms the ISCCP pixel level (DX) data set. The resulting data set is the first for the TiP that provides cloud information with sufficient resolution for both day and night. Patterns of cloud frequencies during winter, premonsoon, and monsoon seasons are analyzed. Strong diurnal forcing is found for the plateau. Peaks of cloud frequencies above the slopes occur during afternoon, while they are delayed in the valleys, where high cloud frequencies persist throughout the nights. Above the lower parts of the southern foothills of the Himalayas cloud frequencies were for the first time found to increase until the early morning. Katabatic flows are suspected to be responsible for this pattern by initiating the formation of mesoscale convective systems.
| Meteosat | cloud retrieval | Tibet | CloudSat | climatology | dynamic |
Literature type specific fields:
Journal: Journal of Geophysical Research - Atmospheres
Volume: 118
Page Range: 10082–10099
Metadata Provider:
Individual: Maik Dobbermann
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