干旱区生态环境知识资源中心(Arid): Geochemical Behaviour of the Tunisian Background Aerosols in Sirocco Wind Circulations

Arid

DOI	10.1007/s00376-009-0390-8
	Geochemical Behaviour of the Tunisian Background Aerosols in Sirocco Wind Circulations
	Chafai AZRI; Habib ABIDA; Khaled MEDHIOUB
来源期刊	Advances in Atmospheric Sciences
ISSN	0256-1530
出版年	2009
卷号	26 期号:3 页码:390-402
英文摘要	This study examines spatial and time evolutions of the principal constituents of the Tunisian background aerosols under Sirocco wind circulations. Aerosols coming from the Sahara Desert were found to be loaded with particulate matter, especially silicon. The aerosols were shown to have varying geochemical behaviour along the "South-North" displacement of the Saharan plumes, depending on the wind flow characteristics, geomorphologic features and the nature of soils swept by the wind. In the south and the center part of the country, the transfer of aerosol constituents to the soil (by gravity and/or impaction) was probably predominated by localized enrichment phenomena. The latter are reinforced by the effect of turbulent winds over bare soils, wind wakes and probably selective disintegration, especially in the vicinity of the geomorphologic features of central Tunisia. These relatively high features, extending over important distances, appear to be of paramount importance for the phenomena of redistribution of aerosol constituents even during periods without Sirocco wind circulations. In the northern section of the country, aerosol constituent concentrations dropped to almost 50%, in spite of the abundance of localized turbulent winds. This may be explained by the effect of forests and the relatively dense vegetation cover, which clearly reinforces the transfer phenomena to the soil and the attenuate of dust entrainment.
英文关键词	aerosols Sahara Sirocco Tunisia turbulent winds
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3751085
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335026
作者单位	Chafai AZRI, Department of Geology, Faculty of Sciences of Sfax ( FSS), Sfax, 3000, Tunisia.; Habib ABIDA, Department of Geology, Faculty of Sciences of Sfax ( FSS), Sfax, 3000, Tunisia.; Khaled MEDHIOUB, Institute of Preparatory Engineering Studies of Sfax ( IPEIS), Sfax, 3018, Tunisia.
推荐引用方式 GB/T 7714	Chafai AZRI,Habib ABIDA,Khaled MEDHIOUB. Geochemical Behaviour of the Tunisian Background Aerosols in Sirocco Wind Circulations[J],2009,26(3):390-402.
APA	Chafai AZRI,Habib ABIDA,&Khaled MEDHIOUB.(2009).Geochemical Behaviour of the Tunisian Background Aerosols in Sirocco Wind Circulations.Advances in Atmospheric Sciences,26(3),390-402.
MLA	Chafai AZRI,et al."Geochemical Behaviour of the Tunisian Background Aerosols in Sirocco Wind Circulations".Advances in Atmospheric Sciences 26.3(2009):390-402.