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Representation of precipitation and top-of-atmosphere radiation in a multi-model convection-permitting ensemble for the Lake Victoria Basin (East-Africa)

Lipzig, Nicole P. M. van ; Walle, Jonas Van de; Belušić, Danijel; Berthou, Ségolène; Coppola, Erika; Demuzere, Matthias; Fink, Andreas H. 1; Finney, Declan L.; Glazer, Russell; Ludwig, Patrick ORCID iD icon 1; Marsham, John H.; Nikulin, Grigory; Pinto, Joaquim G. 1; Rowell, David P.; Wu, Minchao; Thiery, Wim
1 Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO), Karlsruher Institut für Technologie (KIT)

Abstract:

The CORDEX Flagship Pilot Study ELVIC (climate Extremes in the Lake VICtoria basin) was recently established to investigate how extreme weather events will evolve in this region of the world and to provide improved information for the climate impact community. Here we assess the added value of the convection-permitting scale simulations on the representation of moist convective systems over and around Lake Victoria. With this aim, 10 year present-day model simulations were carried out with five regional climate models at both PARameterized (PAR) scales (12–25 km) and Convection-Permitting (CP) scales (2.5–4.5 km), with COSMO-CLM, RegCM, AROME, WRF and UKMO. Most substantial systematic improvements were found in metrics related to deep convection. For example, the timing of the daily maximum in precipitation is systematically delayed in CP compared to PAR models, thereby improving the agreement with observations. The large overestimation in the total number of rainy events is alleviated in the CP models. Systematic improvements were found in the diurnal cycle in Top-Of-Atmosphere (TOA) radiation and in some metrics for precipitation intensity. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000153042
Veröffentlicht am 25.11.2022
Originalveröffentlichung
DOI: 10.1007/s00382-022-06541-5
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0930-7575, 1432-0894
KITopen-ID: 1000153042
HGF-Programm 12.11.33 (POF IV, LK 01) Regional Climate and Hydrological Cycle
Erschienen in Climate Dynamics
Verlag Springer
Band 60
Seiten 4033–4054
Vorab online veröffentlicht am 04.11.2022
Schlagwörter CORDEX Flagship Pilot Study, Regional climate models, Extreme weather events, Tropical deep convection, Convection permitting simulations, Kilometer-scale resolution, Lake Victoria basin, Equatorial Africa
Nachgewiesen in Web of Science
Scopus
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