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Verlagsausgabe
DOI: 10.5445/IR/1000084495
Veröffentlicht am 16.07.2018

Numerical simulations of aerosol radiative effects and their impact on clouds and atmospheric dynamics over southern West Africa

Deetz, Konrad; Vogel, Heike; Knippertz, Peter; Adler, Bianca; Taylor, Jonathan; Coe, Hugh; Bower, Keith; Haslett, Sophie; Flynn, Michael; Dorsey, James; Crawford, Ian; Kottmeier, Christoph; Vogel, Bernhard

Abstract:
Abstract. Southern West Africa (SWA) is undergoing rapid and significant socioeconomic changes associated with a massive increase in air pollution. Still, the impact of atmospheric pollutants, in particular that of aerosol particles, on weather and climate in this region is virtually unexplored. In this study, the regional-scale model framework COSMO-ART is applied to SWA for a summer monsoon process study on 2–3 July 2016 to assess the aerosol direct and indirect effect on clouds and atmospheric dynamics. The modeling study is supported by observational data obtained during the extensive field campaign of the project DACCIWA (Dynamics–Aerosol–Chemistry–Cloud Interactions in West Africa) in June–July 2016. As indicated in previous studies, a coastal front is observed that develops during daytime and propagates inland in the evening (Atlantic inflow). Increasing the aerosol amount in COSMO-ART leads to reduced propagation velocities with frontal displacements of 10–30km and a weakening of the nocturnal low-level jet. This is related to a subtle balance of processes related to the decrease in near-surface heating: (1) flow deceleratio ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1680-7324
URN: urn:nbn:de:swb:90-844951
KITopen ID: 1000084495
HGF-Programm 12.01.01; LK 01
Erschienen in Atmospheric chemistry and physics
Band 18
Heft 13
Seiten 9767–9788
Vorab online veröffentlicht am 11.07.2018
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