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@ARTICLE{Ha:917265,
author = {Ha, Minh T. and Bastin, Sophie and Drobinski, Philippe and
Fita, L. and Polcher, J. and Bock, O. and Chiriaco, M. and
Belušić, D. and Caillaud, C. and Dobler, A. and Fernandez,
J. and Görgen, Klaus and Hodnebrog, Ø. and Kartsios, S.
and Katragkou, E. and Lavin-Gullon, A. and Lorenz, T. and
Milovac, J. and Panitz, H.-J. and Sobolowski, S. and
Truhetz, H. and Warrach-Sagi, K. and Wulfmeyer, V.},
title = {{P}recipitation frequency in {M}ed-{CORDEX} and
{EURO}-{CORDEX} ensembles from 0.44° to
convection-permitting resolution: impact of model resolution
and convection representation},
journal = {Climate dynamics},
volume = {2022},
issn = {0930-7575},
address = {Heidelberg},
publisher = {Springer},
reportid = {FZJ-2023-00495},
pages = {0},
year = {2022},
abstract = {Recent studies using convection-permitting (CP) climate
simulations have demonstrated a step-change in the
representation of heavy rainfall and rainfall
characteristics (frequency-intensity) compared to coarser
resolution Global and Regional climate models. The goal of
this study is to better understand what explains the weaker
frequency of precipitation in the CP ensemble by assessing
the triggering process of precipitation in the different
ensembles of regional climate simulations available over
Europe. We focus on the statistical relationship between
tropospheric temperature, humidity and precipitation to
understand how the frequency of precipitation over Europe
and the Mediterranean is impacted by model resolution and
the representation of convection (parameterized vs.
explicit). We employ a multi-model data-set with three
different resolutions (0.44°, 0.11° and 0.0275°) produced
in the context of the MED-CORDEX, EURO-CORDEX and the CORDEX
Flagship Pilot Study "Convective Phenomena over Europe and
the Mediterranean" (FPSCONV). The multi-variate approach is
applied to all model ensembles, and to several surface
stations where the integrated water vapor (IWV) is derived
from Global Positioning System (GPS) measurements. The
results show that all model ensembles capture the
temperature dependence of the critical value of IWV (IWVcv),
above which an increase in precipitation frequency occurs,
but the differences between the models in terms of the value
of IWVcv, and the probability of its being exceeded, can be
large at higher temperatures. The lower frequency of
precipitation in convection-permitting simulations is not
only explained by higher temperatures but also by a higher
IWVcv necessary to trigger precipitation at similar
temperatures, and a lower probability to exceed this
critical value. The spread between models in simulating
IWVcv and the probability of exceeding IWVcv is reduced over
land in the ensemble of models with explicit convection,
especially at high temperatures, when the convective
fraction of total precipitation becomes more important and
the influence of the representation of entrainment in models
thus becomes more important. Over lowlands, both model
resolution and convection representation affect
precipitation triggering while over mountainous areas,
resolution has the highest impact due to orography-induced
triggering processes. Over the sea, since lifting is
produced by large-scale convergence, the probability to
exceed IWVcv does not depend on temperature, and the model
resolution does not have a clear impact on the results.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000909632600001},
doi = {10.1007/s00382-022-06594-6},
url = {https://juser.fz-juelich.de/record/917265},
}