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The radiative impact of out-of-cloud aerosol hygroscopic growth during the summer monsoon in southern West Africa

Haslett, Sophie L.; Taylor, Jonathan W.; Deetz, Konrad; Vogel, Bernhard; Babić, Karmen; Kalthoff, Norbert; Wieser, Andreas; Dione, Cheikh; Lohou, Fabienne; Brito, Joel; Dupuy, Régis; Schwarzenboeck, Alfons; Zieger, Paul; Coe, Hugh

Abstract:
Water in the atmosphere can exist in the solid, liquid or gas phase. At high humidities, if the aerosol population remains constant, more water vapour will condense onto the particles and cause them to swell, sometimes up to several times their original size. This significant change in size and chemical composition is termed hygroscopic growth and alters a particle's optical properties. Even in unsaturated conditions, this can change the aerosol direct effect, for example by increasing the extinction of incoming sunlight. This can have an impact on a region's energy balance and affect visibility. Here, aerosol and relative humidity measurements collected from aircraft and radiosondes during the Dynamics–Aerosol–Chemistry–Cloud Interactions in West Africa (DACCIWA) campaign were used to estimate the effect of highly humid layers of air on aerosol optical properties during the monsoon season in southern West Africa. The effects of hygroscopic growth in this region are of particular interest due to the regular occurrence of high humidity and the high levels of pollution in the region. The Zdanovskii, Stokes and Robinson (ZSR) mixing ru ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000090938
Veröffentlicht am 13.02.2019
Seitenaufrufe: 18
seit 14.02.2019
Downloads: 15
seit 15.02.2019
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1680-7324
urn:nbn:de:swb:90-909380
KITopen-ID: 1000090938
HGF-Programm 12.01.02 (POF III, LK 01)
Erschienen in Atmospheric chemistry and physics
Band 19
Heft 3
Seiten 1505–1520
Vorab online veröffentlicht am 05.02.2019
Nachgewiesen in Web of Science
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