caa a22 4500 60547494X CHVBK 20210128100349.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00382-014-2262-x doi (NATIONALLICENCE)springer-10.1007/s00382-014-2262-x Dynamical downscaling of CMIP5 global circulation models over CORDEX-Africa with COSMO-CLM: evaluation over the present climate and analysis of the added value [Elektronische Daten] [Alessandro Dosio, Hans-Jürgen Panitz, Martina Schubert-Frisius, Daniel Lüthi] In this work we present the results of the application of the consortium for small-scale modeling (COSMO) regional climate model (COSMO-CLM, hereafter, CCLM) over Africa in the context of the coordinated regional climate downscaling experiment. An ensemble of climate change projections has been created by downscaling the simulations of four global climate models (GCM), namely: MPI-ESM-LR, HadGEM2-ES, CNRM-CM5, and EC-Earth. Here we compare the results of CCLM to those of the driving GCMs over the present climate, in order to investigate whether RCMs are effectively able to add value, at regional scale, to the performances of GCMs. It is found that, in general, the geographical distribution of mean sea level pressure, surface temperature and seasonal precipitation is strongly affected by the boundary conditions (i.e. driving GCMs), and seasonal statistics are not always improved by the downscaling. However, CCLM is generally able to better represent the annual cycle of precipitation, in particular over Southern Africa and the West Africa monsoon (WAM) area. By performing a singular spectrum analysis it is found that CCLM is able to reproduce satisfactorily the annual and sub-annual principal components of the precipitation time series over the Guinea Gulf, whereas the GCMs are in general not able to simulate the bimodal distribution due to the passage of the WAM and show a unimodal precipitation annual cycle. Furthermore, it is shown that CCLM is able to better reproduce the probability distribution function of precipitation and some impact-relevant indices such as the number of consecutive wet and dry days, and the frequency of heavy rain events. The Author(s), 2014 COSMO-CLM regional climate model nationallicence CORDEX-Africa nationallicence CMIP5 GCMs nationallicence Added value nationallicence Dosio Alessandro Institute for Environment and Sustainability, European Commission Joint Research Centre, via E.Fermi 2749, 21027, Ispra, VA, Italy aut Panitz Hans-Jürgen Karlsruher Institut für Technologie, Karlsruhe, Germany aut Schubert-Frisius Martina Helmholtz-Zentrum Geesthacht, Geesthacht, Germany aut Lüthi Daniel Swiss Federal Institute of Technology (ETH), Zurich, Switzerland aut Climate Dynamics Springer Berlin Heidelberg 44/9-10(2015-05-01), 2637-2661 0930-7575 44:9-10<2637 2015 44 382 https://doi.org/10.1007/s00382-014-2262-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2262-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dosio Alessandro Institute for Environment and Sustainability, European Commission Joint Research Centre, via E.Fermi 2749, 21027, Ispra, VA, Italy aut NATIONALLICENCE 700 1- Panitz Hans-Jürgen Karlsruher Institut für Technologie, Karlsruhe, Germany aut NATIONALLICENCE 700 1- Schubert-Frisius Martina Helmholtz-Zentrum Geesthacht, Geesthacht, Germany aut NATIONALLICENCE 700 1- Lüthi Daniel Swiss Federal Institute of Technology (ETH), Zurich, Switzerland aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/9-10(2015-05-01), 2637-2661 0930-7575 44:9-10<2637 2015 44 382