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@ARTICLE{Konopka:58072,
author = {Konopka, P. and Günther, G. and Müller, R. and dos
Santos, F. H. and Schiller, C. and Ulanovsky, A. and
Schlager, H. and Volk, C. M. and Viciani, S. and Pan, L. and
McKenna, D. S. and Riese, M.},
title = {{C}ontribution of mixing to the upward transport across the
{TTL}},
journal = {Atmospheric chemistry and physics},
volume = {7},
issn = {1680-7316},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {PreJuSER-58072},
pages = {3285 - 3308},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {During the second part of the TROCCINOX campaign that took
place in Brazil in early 2005, chemical species were
measured on-board the high-altitude research aircraft
Geophysica ( ozone, water vapor, NO, NOy, CH4 and CO) in the
altitude range up to 20 km ( or up to 450 K potential
temperature), i.e. spanning the entire TTL region roughly
extending between 350 and 420 K.Here, analysis of transport
across the TTL is performed using a new version of the
Chemical Lagrangian Model of the Stratosphere (CLaMS). In
this new version, the stratospheric model has been extended
to the earth surface. Above the tropopause, the isentropic
and cross-isentropic advection in CLaMS is driven by
meteorological analysis winds and heating/ cooling rates
derived from a radiation calculation. Below the tropopause,
the model smoothly transforms from the isentropic to the
hybrid-pressure coordinate and, in this way, takes into
account the effect of large-scale convective transport as
implemented in the vertical wind of the meteorological
analysis. As in previous CLaMS simulations, the irreversible
transport, i. e. mixing, is controlled by the local
horizontal strain and vertical shear rates.Stratospheric and
tropospheric signatures in the TTL can be seen both in the
observations and in the model. The composition of air above
approximate to 350 K is mainly controlled by mixing on a
time scale of weeks or even months. Based on CLaMS transport
studies where mixing can be completely switched off, we
deduce that vertical mixing, mainly driven by the vertical
shear in the tropical flanks of the subtropical jets and, to
some extent, in the the outflow regions of the large-scale
convection, offers an explanation for the upward transport
of trace species from the main convective outflow at around
350 K up to the tropical tropopause around 380 K.},
keywords = {J (WoSType)},
cin = {ICG-1 / JARA-SIM},
ddc = {550},
cid = {I:(DE-Juel1)VDB790 / I:(DE-Juel1)VDB1045},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK406},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000247572500015},
doi = {10.5194/acp-7-3285-2007},
url = {https://juser.fz-juelich.de/record/58072},
}