München 2004 – scientific programme

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UP: Umweltphysik

UP 18: Poster: Aerosol und Messtechnik

UP 18.1: Poster

Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3

Ice–supersaturated regions — •Peter Spichtinger and Klaus Gierens — Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Cirrus clouds, including sub–species as condensation trails and subvisible cirrus, constitute now a well established research topic within the atmospheric sciences. But their formation regions, i.e. ice–supersaturated air masses, are still not very well characterised. There is now direct evidence, that ice–supersaturation is frequent in upper tropospheric clear air and that it does even occur in the lowermost stratosphere. Such regions have been termed ice–supersaturated regions (ISSRs,

[1] Gierens et al., Ann. Geophys. 17, 1218–1226, 1999). In the last three years we have evaluated various data sets (aircraft – MOZAIC, satellite – MLS, radiosondes) and could answer some questions concerning the global distribution of ISSRs, their attributes and some aspects of formation and development of ISSRs. Some of these results are presented on this poster.