4.3 Article

Dynamical mechanisms controlling the vertical redistribution of dust and the thermodynamic structure of the West Saharan atmospheric boundary layer during summer

Journal

ATMOSPHERIC SCIENCE LETTERS
Volume 10, Issue 1, Pages 34-42

Publisher

WILEY
DOI: 10.1002/asl.207

Keywords

West African monsoon; harmattan; AMMA; GERBILS; SAMUM; CALIPSO

Funding

  1. European Community's Sixth Framework Research Programme
  2. Natural Environment Research Council [NE/B505538/1] Funding Source: researchfish

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The Saharan atmospheric boundary layer (SABL) plays a significant role in the atmospheric global circulation and directly affects the vertical redistribution of dust originated in the Sahara, the world's largest dust source. Recent measurements have revealed a variety of new dynamical mechanisms that control the structure of the SABL, which are responsible for exchange between the Saharan convective and residual boundary layers. Using new space-borne laser remote sensing data (CALIPSO) and recently published results, we provide an overview of the following known dynamical mechanisms: diurnal vertical mixing, dynamical lifting (density currents and cold air outbreaks) and topographic effects (mountains and albedo anomalies). Copyright (c) 2009 Royal Meteorological Society

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