干旱区生态环境知识资源中心(Arid): Shutting down dust emission during the middle Holocene drought in the Sonoran Desert, Arizona, USA

Arid

DOI	10.1130/G48550.1
	Shutting down dust emission during the middle Holocene drought in the Sonoran Desert, Arizona, USA
	Tau, Guy; Crouvi, Onn; Enzel, Yehouda; Teutsch, Nadya; Ginoux, Paul; Rasmussen, Craig
通讯作者	Tau, G (corresponding author), Hebrew Univ Jerusalem, Inst Earth Sci, IL-9190401 Jerusalem, Israel. ; Tau, G (corresponding author), Geol Survey Israel, 32 Yeshayahu Leibowitz, IL-9692100 Jerusalem, Israel.
来源期刊	GEOLOGY
ISSN	0091-7613
EISSN	1943-2682
出版年	2021
卷号	49 期号:7 页码:857-861
英文摘要	Long-term relationships between climate and dust emission remain unclear, with two prevailing but opposite hypotheses for effects of climate shifts: (1) increased dust emission due to increasing aridity imposing a vegetation change, or (2) decreased dust emission due to increasing aridity which imposes less stormy climate and reduced sediment supply. Here we test these hypotheses by analyzing an similar to 11-m-long core archiving Holocene dust trapped in Montezuma Well, a natural sinkhole in Arizona (southwestern United States), alongside current dust sources and transport pathways. Major elements indicate that Montezuma Well sediments originate from two end members: local carbonate bedrock and external siliceous dust. Core sediments are similar to the adjacent siliceous soils accumulated atop the bedrock, pointing to their eolian origin. Particle-size distributions reveal fine dust transported during winter from the northwestern Sonoran Desert and the Mojave Desert and coarse dust transported during summer from the southwestern Sonoran Desert, similar to current climate systems and dust pathways. A survey of potential dust sources indicates that current summer and winter dust sources in the Sonoran Desert are under a supply-limited state. Dust fluxes were higher during wetter phases of the Holocene when winter sources dominated. During the middle Holocene drought, dust fluxes were minimal and dominated by summer sources until dust input ceased as drought conditions did not produce enough floods to refill sources with sediments. We propose that in the Sonoran Desert, dust emission is strongly connected with climate, increasing during humid intervals and enhanced by fluvial sediment replenishment at dust sources.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000672235900008
WOS关键词	SOUTHWESTERN UNITED-STATES ; CLIMATE ; DEPOSITION ; TRANSPORT ; LOESS
WOS类目	Geology
WOS研究方向	Geology
来源机构	University of Arizona ; Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363418
作者单位	[Tau, Guy; Enzel, Yehouda] Hebrew Univ Jerusalem, Inst Earth Sci, IL-9190401 Jerusalem, Israel; [Tau, Guy; Crouvi, Onn; Teutsch, Nadya] Geol Survey Israel, 32 Yeshayahu Leibowitz, IL-9692100 Jerusalem, Israel; [Ginoux, Paul] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ 08540 USA; [Rasmussen, Craig] Univ Arizona, Dept Environm Sci, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Tau, Guy,Crouvi, Onn,Enzel, Yehouda,et al. Shutting down dust emission during the middle Holocene drought in the Sonoran Desert, Arizona, USA[J]. University of Arizona, Hebrew University of Jerusalem,2021,49(7):857-861.
APA	Tau, Guy,Crouvi, Onn,Enzel, Yehouda,Teutsch, Nadya,Ginoux, Paul,&Rasmussen, Craig.(2021).Shutting down dust emission during the middle Holocene drought in the Sonoran Desert, Arizona, USA.GEOLOGY,49(7),857-861.
MLA	Tau, Guy,et al."Shutting down dust emission during the middle Holocene drought in the Sonoran Desert, Arizona, USA".GEOLOGY 49.7(2021):857-861.