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

被引：115
|
作者：
Cuesta, Juan [1 ,2 ]
Marsham, John H. [2 ]
Parker, Douglas J. [2 ]
Flamant, Cyrille [3 ]
机构：
[1] Ecole Polytech, Inst Pierre Simon Laplace, Meteorol Dynam Lab, F-91128 Palaiseau, France
[2] Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
[3] Inst Pierre Simon Laplace, Serv Aeron, F-75252 Paris, France
来源：
ATMOSPHERIC SCIENCE LETTERS | 2009年 / 10卷 / 01期
关键词：
West African monsoon; harmattan; AMMA; GERBILS; SAMUM; CALIPSO; INTERTROPICAL DISCONTINUITY REGION; AFRICAN MONSOON; DIURNAL CYCLE; EMISSIONS; MESOSCALE; DISTURBANCES; CONVECTION; TRANSPORT; SURFACE;
D O I：
10.1002/asl.207
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
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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页码：34 / 42
页数：9
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