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Dust plume formation in the free troposphere and aerosol size distribution during the Saharan Mineral Dust Experiment in North Africa

Khan, Basit; Stenchikov, Georgiy; Weinzierl, Bernadett; Kalenderski, Stoitchko; Osipov, Sergey

Dust particles mixed in the free troposphere have longer lifetimes than airborne particles near the surface.
Their cumulative radiative impact on earth’s meteorological processes and climate might be significant despite
their relatively small contribution to total dust abundance. One example is the elevated dust-laden Saharan Air
Layer (SAL) over the tropical and subtropical North Atlantic, which cools the sea surface. To understand the
formation mechanisms of a dust layer in the free troposphere, this study combines model simulations and dust
observations collected during the first stage of the Saharan Mineral Dust Experiment (SAMUM-I), which
sampled dust events that extended from Morocco to Portugal, and investigated the spatial distribution and
the microphysical, optical, chemical, and radiative properties of Saharan mineral dust. The Weather Research
Forecast model coupled with the Chemistry/Aerosol module (WRF-Chem) is employed to reproduce the
meteorological environment and spatial and size distributions of dust. The model domain covers northwest
Africa and adjacent water with 5 km horizontal grid spacing and 51 vertical layers. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000105081
Veröffentlicht am 17.01.2020
DOI: 10.3402/tellusb.v67.27170
Zitationen: 8
Web of Science
Zitationen: 12
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2015
Sprache Englisch
Identifikator ISSN: 1600-0889
KITopen-ID: 1000105081
Erschienen in Tellus / B
Verlag Taylor & Francis Open Access
Band 67
Heft 1
Seiten Article no: 27170
Vorab online veröffentlicht am 27.11.2015
Schlagwörter regional modelling, high resolution, WRF-Chem, SAL, boundary layer, dust load
Nachgewiesen in Scopus
Web of Science
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