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The diurnal stratocumulus-to-cumulus transition over land in southern West Africa

Pedruzo-Bagazgoitia, Xabier; Roode, Stephan R. de; Adler, Bianca; Babić, Karmen; Dione, Cheikh; Kalthoff, Norbert; Lohou, Fabienne; Lothon, Marie; Vilà-Guerau de Arellano, Jordi

Abstract:
The misrepresentation of the diurnal cycle of boundary layer clouds by large-scale models strongly impacts the modeled regional energy balance in southern West Africa. In particular, recognizing the processes involved in the maintenance and transition of the nighttime stratocumulus to diurnal shallow cumulus over land remains a challenge. This is due to the fact that over vegetation, surface fluxes exhibit a much larger magnitude and variability than on the more researched marine stratocumulus transitions. An improved understanding of the interactions between surface and atmosphere is thus necessary to improve its representation. To this end, the Dynamics-aerosol-chemistry-cloud interactions in West Africa (DACCIWA) measurement campaign gathered a unique dataset of observations of the frequent stratocumulus-to-cumulus transition in southern West Africa. Inspired and constrained by these observations, we perform a series of numerical experiments using large eddy simulation. The experiments include interactive radiation and surface schemes where we explicitly resolve, quantify and describe the physical processes driving such transition. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000117549
Veröffentlicht am 05.03.2020
Originalveröffentlichung
DOI: 10.5194/acp-20-2735-2020
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000117549
HGF-Programm 12.01.02 (POF III, LK 01) Proc.res.f.multisc.predictab.of weather
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 20
Heft 5
Seiten 2735–2754
Vorab online veröffentlicht am 05.03.2020
Nachgewiesen in Web of Science
Scopus
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