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@ARTICLE{Orr:187571,
author = {Orr, A. and Hosking, J. S. and Hoffmann, L. and Keeble, J.
and Dean, S. M. and Roscoe, H. K. and Abraham, N. L. and
Vosper, S. and Braesicke, P.},
title = {{I}nclusion of mountain-wave-induced cooling for the
formation of {PSC}s over the {A}ntarctic {P}eninsula in a
chemistry-climate model},
journal = {Atmospheric chemistry and physics},
volume = {15},
number = {2},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2015-01199},
pages = {1071 - 1086},
year = {2015},
abstract = {An important source of polar stratospheric clouds (PSCs),
which play a crucial role in controlling polar stratospheric
ozone depletion, is from the temperature fluctuations
induced by mountain waves. However, this formation mechanism
is usually missing in chemistry–climate models because
these temperature fluctuations are neither resolved nor
parameterised. Here, we investigate the representation of
stratospheric mountain-wave-induced temperature fluctuations
by the UK Met Office Unified Model (UM) at climate scale and
mesoscale against Atmospheric Infrared Sounder satellite
observations for three case studies over the Antarctic
Peninsula. At a high horizontal resolution (4 km) the
regional mesoscale configuration of the UM correctly
simulates the magnitude, timing, and location of the
measured temperature fluctuations. By comparison, at a low
horizontal resolution (2.5° × 3.75°) the global climate
configuration fails to resolve such disturbances. However,
it is demonstrated that the temperature fluctuations
computed by a mountain wave parameterisation scheme inserted
into the climate configuration (which computes the
temperature fluctuations due to unresolved mountain waves)
are in relatively good agreement with the mesoscale
configuration responses for two of the three case studies.
The parameterisation was used to include the simulation of
mountain-wave-induced PSCs in the global chemistry–climate
configuration of the UM. A subsequent sensitivity study
demonstrated that regional PSCs increased by up to $50\%$
during July over the Antarctic Peninsula following the
inclusion of the local mountain-wave-induced cooling phase.},
cin = {JSC},
ddc = {550},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511)},
pid = {G:(DE-HGF)POF3-511},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000351170000019},
doi = {10.5194/acp-15-1071-2015},
url = {https://juser.fz-juelich.de/record/187571},
}