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@ARTICLE{Vogel:12481,
author = {Vogel, B. and Pan, L.L. and Konopka, P. and Günther, G.
and Müller, R. and Hall, W. and Campos, T. and Pollack, I.
and Weinheimer, A. and Wei, J. and Atlas, E.L. and Bowman,
K.P.},
title = {{T}ransport pathways and signatures of mixing in the
extratropical tropopause region derived from {L}agrangian
model simulations},
journal = {Journal of Geophysical Research},
volume = {116},
issn = {0148-0227},
address = {Washington, DC},
publisher = {Union},
reportid = {PreJuSER-12481},
pages = {D05306},
year = {2011},
note = {The authors thank three anonymous reviewers for their very
helpful reviews. The START08 experiment is sponsored by the
National Science Foundation (NSF). The authors gratefully
acknowledge the instrument team, cosponsored by NFS and
NCAR, and the NCAR Research Aviation Facility staff for
running the flight operation. The work by B. Vogel was
partly funded by the German Science Foundation (Deutsche
Forschungsgemeinschaft, DFG) under contract 552102.},
abstract = {Model simulations with the Chemical Lagrangian Model of the
Stratosphere (CLaMS) driven by wind fields of the National
Center for Environmental Prediction (NCEP) were performed in
the midlatitude tropopause region in April 2008 to study two
research flights conducted during the START08 campaign. One
flight targeted a deep tropospheric intrusion and another
flight targeted a deep stratospheric intrusion event, both
of them in the vicinity of the subtropical and polar jet.
Air masses with strong signatures of mixing between
stratospheric and tropospheric air masses were identified
from measured CO-O-3 correlations, and the characteristics
were reproduced by CLaMS model simulations. CLaMS
simulations in turn complement the observations and provide
a broader view of the mixed region in physical space. Using
artificial tracers of air mass origin within CLaMS yields
unique information about the transport pathways and their
contribution to the composition in the mixed region from
different transport origins. Three different regions are
examined to categorize dominant transport processes: (1) on
the cyclonic side of the polar jet within tropopause folds
where air from the lowermost stratosphere and the cyclonic
side of the jet is transported downward into the
troposphere, (2) on the anticyclonic side of the polar jet
around the 2 PVU surface air masses, where signatures of
mixing between the troposphere and lowermost stratosphere
were found with large contributions of air masses from low
latitudes, and (3) in the lower stratosphere associated with
a deep tropospheric intrusion originating in the tropical
tropopause layer (TTL). Moreover, the time scale of
transport from the TTL into the lowermost stratosphere is in
the range of weeks whereas the stratospheric intrusions
occur on a time scale of days.},
keywords = {J (WoSType)},
cin = {IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK491},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000288604300003},
doi = {10.1029/2010JD014876},
url = {https://juser.fz-juelich.de/record/12481},
}