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@ARTICLE{Bacer:857190,
author = {Bacer, Sara and Sullivan, Sylvia C. and Karydis, Vlassis A.
and Barahona, Donifan and Krämer, Martina and Nenes,
Athanasios and Tost, Holger and Tsimpidi, Alexandra P. and
Lelieveld, Jos and Pozzer, Andrea},
title = {{I}mplementation of a comprehensive ice crystal formation
parameterization for cirrus and mixed-phase clouds in the
{EMAC} model (based on {MESS}y 2.53)},
journal = {Geoscientific model development},
volume = {11},
number = {10},
issn = {1991-9603},
address = {Katlenburg-Lindau},
publisher = {Copernicus},
reportid = {FZJ-2018-06427},
pages = {4021 - 4041},
year = {2018},
abstract = {A comprehensive ice nucleation parameterization has been
implemented in the global chemistry-climate model EMAC to
improve the representation of ice crystal number
concentrations (ICNCs). The parameterization of Barahona and
Nenes (2009, hereafter BN09) allows for the treatment of ice
nucleation taking into account the competition for water
vapour between homogeneous and heterogeneous nucleation in
cirrus clouds. Furthermore, the influence of chemically
heterogeneous, polydisperse aerosols is considered by
applying one of the multiple ice nucleating particle
parameterizations which are included in BN09 to compute the
heterogeneously formed ice crystals. BN09 has been modified
in order to consider the pre-existing ice crystal effect and
implemented to operate both in the cirrus and in the
mixed-phase regimes. Compared to the standard EMAC
parameterizations, BN09 produces fewer ice crystals in the
upper troposphere but higher ICNCs in the middle
troposphere, especially in the Northern Hemisphere where ice
nucleating mineral dust particles are relatively abundant.
Overall, ICNCs agree well with the observations, especially
in cold cirrus clouds (at temperatures below 205K), although
they are underestimated between 200 and 220K. As BN09 takes
into account processes which were previously neglected by
the standard version of the model, it is recommended for
future EMAC simulations.},
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},
UT = {WOS:000446811700002},
doi = {10.5194/gmd-11-4021-2018},
url = {https://juser.fz-juelich.de/record/857190},
}