干旱区生态环境知识资源中心(Arid): Locally recycled late Pleistocene loess feeds modern dust storms at the desert margins of the eastern Mediterranean, Israel

Arid

DOI	10.1016/j.aeolia.2020.100612
	Locally recycled late Pleistocene loess feeds modern dust storms at the desert margins of the eastern Mediterranean, Israel
	Shalom, Ohad; Crouvi, Onn; Enzel, Yehouda; Rosenfeld, Daniel
通讯作者	Crouvi, O
来源期刊	AEOLIAN RESEARCH
ISSN	1875-9637
EISSN	2212-1684
出版年	2020
卷号	46
英文摘要	Current dust storms, originating from afar, are common in Israel and the eastern Mediterranean, and thus most dust sources are considered to be distal. However, recent studies suggest that the latest Quaternary loess accreted in the Northern Negev can also serve as a proximal source of dust. These sources were mostly neglected in past discussions as contributors of dust. Here, we demonstrate that such proximal dust sources, mostly the Negev loess, currently contribute relatively large amounts of recycled dust to the regional dust cycle. We conducted a sampling campaign of deposited dust during individual dust storms and identified high content of coarse silt grains and quartzo-feldspathic minerals within and adjacent to the Negev loess that gradually decreases toward the north. These grains, characteristics of the Negev loess, indicate a short transport distance. In addition, our data reveal that local wind speed is the limiting factor for emitting proximal dust, regardless of the synoptic system. We determined that proximal sources in Israel emit dust during either local events or as a part of regional dust storms originating from afar. We evaluate the minimal contribution of this proximal dust to the total mass of deposited dust as 58-74%, 54-70%, 52-64%, and 26-34% for northern Negev, central Negev, central mountainous region, and northern Israel, respectively. These estimates indicate that at the desert fringe, both proximal and distal sources of dust should be considered when inferring dust sources from dust geochemistry that can sometimes be similar due to the long dust history.
英文关键词	Proximal dust sources Desert loess Levant Middle East Negev
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000564564400004
WOS关键词	NEGEV DESERT ; DEPOSITION ; EMISSION ; TRANSPORT ; CLIMATE ; ORIGIN ; SOILS ; DUNES ; CYCLE ; AREA
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325926
作者单位	[Shalom, Ohad; Enzel, Yehouda; Rosenfeld, Daniel] Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel; [Shalom, Ohad; Crouvi, Onn] Geol Survey Israel, 32 Yeshayahu Leibowitz St, IL-9371234 Jerusalem, Israel
推荐引用方式 GB/T 7714	Shalom, Ohad,Crouvi, Onn,Enzel, Yehouda,et al. Locally recycled late Pleistocene loess feeds modern dust storms at the desert margins of the eastern Mediterranean, Israel[J]. Hebrew University of Jerusalem,2020,46.
APA	Shalom, Ohad,Crouvi, Onn,Enzel, Yehouda,&Rosenfeld, Daniel.(2020).Locally recycled late Pleistocene loess feeds modern dust storms at the desert margins of the eastern Mediterranean, Israel.AEOLIAN RESEARCH,46.
MLA	Shalom, Ohad,et al."Locally recycled late Pleistocene loess feeds modern dust storms at the desert margins of the eastern Mediterranean, Israel".AEOLIAN RESEARCH 46(2020).