Journal Article

PreJuSER-32490

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ultrathin tropical tropopause clouds I : Cloud morphology and occurence

Peter, T. ; Luo, B. P. ; Wernli, H. ; Wirth, M. ; Kiemle, C. ; Flentje, H. ; Yushkov, V. A. ; Khattatov, V. ; Rudakov, V. ; Thomas, A. ; Borrmann, S. ; Toci, G. ; Mazzinghi, P. ; Beuermann, J. ; Schiller, C.FZJ* ; Cairo, F. ; di Donfrancesco, G. ; Adriani, A. ; Volk, C. M. ; Strom, J. ; Noone, K. ; Mitev, V. ; MacKenzie, R. A. ; Carslaw, K. S. ; Trautmann, T. ; Santacesaria, V. ; Stefanutti, L.

2003
EGU Katlenburg-Lindau

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/729

Abstract: Subvisible cirrus clouds (SVCs) may contribute to dehydration close to the tropical tropopause. The higher and colder SVCs and the larger their ice crystals, the more likely they represent the last efficient point of contact of the gas phase with the ice phase and, hence, the last dehydrating step, before the air enters the stratosphere. The first simultaneous in situ and remote sensing measurements of SVCs were taken during the APE-THESEO campaign in the western Indian ocean in February/March 1999. The observed clouds, termed Ultrathin Tropical Tropopause Clouds (UTTCs), belong to the geometrically and optically thinnest large-scale clouds in the Earth's atmosphere. Individual UTTCs may exist for many hours as an only 200-300 m thick cloud layer just a few hundred meters below the tropical cold point tropopause, covering up to 10(5) km(2). With temperatures as low as 181 K these clouds are prime representatives for defining the water mixing ratio of air entering the lower stratosphere.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Stratosphäre (ICG-I)

Research Program(s):

1. Chemie und Dynamik der Geo-Biosphäre (U01)

Appears in the scientific report 2003

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Database coverage:

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