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@ARTICLE{Tritscher:856980,
author = {Tritscher, Ines and Grooß, Jens-Uwe and Spang, Reinhold
and Pitts, Michael C. and Poole, Lamont R. and Müller, Rolf
and Riese, Martin},
title = {{L}agrangian simulation of ice particles and resulting
dehydration in the polar winter stratosphere},
journal = {Atmospheric chemistry and physics / Discussions Discussions
[...]},
volume = {},
number = {337},
issn = {1680-7375},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2018-06269},
pages = {1 - 32},
year = {2018},
abstract = {Polar ozone loss in late winter and early spring is caused
by enhanced concentrations of active chlorine. The surface
necessary for heterogeneous reactions activating chlorine
species is provided by cold stratospheric aerosols and polar
stratospheric clouds (PSCs). Moreover, sedimentation of PSC
particles changes the chemical composition of the lower
stratosphere and alters the process of ozone depletion by
irreversible redistribution of nitric acid and water
vapor.The Chemical Lagrangian Model of the Stratosphere
(CLaMS) simulates the nucleation, growth, sedimentation, and
evaporation of PSC particles along individual trajectories.
Particles consisting of nitric acid trihydrate (NAT) were
the focus of previous work and are known for their potential
to denitrify the polar stratosphere. Here, we carried this
idea forward and introduced the formation of ice PSCs and
the related dehydration within the sedimentation module of
CLaMS.We show results from the Arctic winter 2009/2010,
which is already well characterized because of the RECONCILE
aircraft campaign and connected work. CLaMS simulations from
the Antarctic winter 2011 complete this study and
demonstrate the model's performance over an entire PSC
season in the Southern Hemisphere. For both hemispheres, we
present CLaMS results in comparison to PSC observations from
the Cloud-Aerosol Lidar with Orthogonal Polarization
(CALIOP) and the Michelson Interferometer for Passive
Atmospheric Sounding (MIPAS). Moreover, we confront CLaMS
simulations of water vapor with vortex-wide Microwave Limb
Sounder (MLS) observations. Observations and simulations are
compared on season-long and vortex-wide scales as well as
for single PSC events. The simulations reproduce well both
the timing and extent of PSC occurrence inside the entire
vortex. Divided into specific PSC classes, CLaMS results
show good agreement with CALIOP and MIPAS observations, even
for specific days and single satellite orbits. The vertical
redistribution of nitric acid and water during the polar
winter season, as seen in the MLS data, is visible in the
CLaMS data as well. Overall, a conclusive agreement between
CLaMS and a variety of independent measurements is
presented.},
cin = {IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {244 - Composition and dynamics of the upper troposphere and
middle atmosphere (POF3-244)},
pid = {G:(DE-HGF)POF3-244},
typ = {PUB:(DE-HGF)16},
doi = {10.5194/acp-2018-337},
url = {https://juser.fz-juelich.de/record/856980},
}