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@ARTICLE{Stefanutti:39741,
author = {Stefanutti, L. and McKenzie, A. R. and Santacesaria, V. and
Adriani, A. and Balestri, S. and Borrmann, S. and Khattatov,
V. and Mazinghi, P. and Merkulov, S. and Mitev, V. and
Rudakov, V. and Schiller, C. and Toci, G. and Volk, M. and
Yushkov, V. and Flentje, H. and Kiemle, C. and Noone, K. and
Redaelli, G. and Carslaw, K. S. and Peter, Th.},
title = {{T}he {APE}-{THESEO} tropical campaign: an overview},
journal = {Journal of atmospheric chemistry},
volume = {48},
issn = {0167-7764},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {PreJuSER-39741},
pages = {1 - 33},
year = {2004},
note = {Record converted from VDB: 12.11.2012},
abstract = {The APE-THESEO campaign was held from 15 February to 15
March 1999 from the Seychelles in the western Indian Ocean.
APE-THESEO stands for 'Airborne Platform for Earth
observation-(contribution to) the Third European
Stratospheric Experiment on Ozone'. The campaign aimed to
study processes controlling the low water content of the
stratosphere, including the mechanisms of cloud formation in
the tropical tropopause region, and transport processes,
studied using measurements of long-lived trace gases and
ozone.Two aircraft were used: the high-altitude research
aircraft, M-55 Geophysica, which can fly up to 21 km, and
the Falcon of the Deutsches Zentrum fur Luft- und Raumfahrt,
a tropospheric aircraft. Seven flights were performed,
including the first simultaneous in situ and remote sensing
of sub-visible cirrus clouds, the first interception of
sub-visible cirrus using in-flight guidance from a
pathfinding aircraft, and guided descent of a high-altitude
research aircraft into the anvil cloud at the top of a
tropical cyclone. In this paper we describe the payload
used, the objectives for each flight, and the meteorological
conditions encountered. First results show that a new type
of cloud, which we have dubbed ultra-thin tropical
tropopause cloud (UTTC), has been observed frequently, and
observed to cover areas of 10(5) km(2). The frequent
coincidence of the tropopause and hygropause implies that
the western Indian Ocean played an important role in the
dehydration of the lower tropical stratosphere during the
season of the mission. UTTCs, sub-visible cirrus, and
visible cirrus, have all been implicated in the observed
dehydration. Tracer measurements indicate little mixing of
stratospheric air into the upper tropical troposphere.},
keywords = {J (WoSType)},
cin = {ICG-I},
ddc = {540},
cid = {I:(DE-Juel1)VDB47},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Environmental Sciences / Meteorology $\&$ Atmospheric
Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000222603900001},
doi = {10.1023/B:JOCH.0000034509.11746.b8},
url = {https://juser.fz-juelich.de/record/39741},
}