TY  - JOUR
AU  - Luo, B. P.
AU  - Peter, Th.
AU  - Flüglistaler, S.
AU  - Wernli, H.
AU  - Wirth, M.
AU  - Kiemle, C.
AU  - Flentje, H.
AU  - Yushkov, V. A.
AU  - Khattatov, V.
AU  - Rudakov, V.
AU  - Thomas, A.
AU  - Borrmann, S.
AU  - Toci, G.
AU  - Mazzinghi, P.
AU  - Beuermann, J.
AU  - Schiller, C.
AU  - Cairo, F.
AU  - Mitev, V.
AU  - MacKenzie, R. A.
AU  - Carslaw, K. S.
AU  - Trautmann, T.
AU  - Santacesaria, V.
AU  - Stefanutti, L.
TI  - Dehydration potential of ultrathin clouds at the tropical tropopause
JO  - Geophysical research letters
VL  - 30
SN  - 0094-8276
CY  - Washington, DC
PB  - American Geophysical Union
M1  - PreJuSER-32485
SP  - 1557
PY  - 2003
N1  - Record converted from VDB: 12.11.2012
AB  - [1] We report on the first simultaneous in situ and remote measurements of subvisible cirrus in the uppermost tropical troposphere. The observed cirrus, called UTTCs ( ultrathin tropical tropopause clouds), are the geometrically (200-300 m) and optically (t approximate to 10(-4)) thinnest large-scale clouds ever sampled (approximate to10(5) km(2)). UTTCs consist of only a few ice particles per liter with mean radius approximate to5 mum, containing only 1-5 % of the total water. Yet, brief adiabatic cooling events only 1-2 K below mean ambient temperature destabilize UTTCs, leading to large sedimenting particles (r approximate to 25 mm). Due to their extreme altitude above 17 km and low particle number density, UTTCs may efficiently dehydrate air during its last encounter with the ice phase before entering the stratosphere.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000183553900001
DO  - DOI:10.1029/2002GL016737
UR  - https://juser.fz-juelich.de/record/32485
ER  -