干旱区生态环境知识资源中心(Arid): Mechanism for enhanced eolian dust flux recorded in North Pacific Ocean sediments since 4.0 Ma: Aridity or humidity at dust source areas in the Asian interior?

Arid

DOI	10.1130/G46862.1
	Mechanism for enhanced eolian dust flux recorded in North Pacific Ocean sediments since 4.0 Ma: Aridity or humidity at dust source areas in the Asian interior?
	Zhang, Qiang1,2 ; Liu, Qingsong 3; Roberts, Andrew P.4; Larrasoana, Juan C.5,6; Shi, Xuefa 7; Jin, Chunsheng 1
通讯作者	Liu, Qingsong
来源期刊	GEOLOGY
ISSN	0091-7613
EISSN	1943-2682
出版年	2020
卷号	48 期号:1 页码:77-81
英文摘要	Eolian material within pelagic North Pacific Ocean (NPO) sediments contains considerable information about paleoclimate evolution in Asian dust source areas. Eolian signals preserved in NPO sediments have been used as indices for enhanced Asian interior aridity. We here report a detailed eolian dust record, with chemical index of alteration (CIA) and Rb/Sr variations, for NPO sediments from Ocean Drilling Program Hole 885A over the past 4.0 m.y. CIA and Rb/Sr co-vary with the dust signal carried by combined eolian hematite and goethite concentrations. Changes in CIA around the intensification of Northern Hemisphere glaciation (iNHG) event at ca. 2.75 Ma indicate that dust production in source areas was associated mostly with physical and chemical weathering before and after the iNHG event, respectively. We here attribute the eolian flux increase into the NPO across the iNHG event mainly to increased availability of wind-erodible sediment in dust source areas derived from snow and glacial meltwater runoff, which resulted from glacial expansion and enhanced snowfall in the mountains surrounding the Tarim region in response to global cooling. Our results provide a deeper understanding of Asian interior environmental changes in response to global paleoclimate changes, where dust source areas became intermittently moister rather than more arid in response to global cooling.
类型	Article
语种	英语
国家	Peoples R China ; Australia ; Spain
开放获取类型	Green Published, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000505235200017
WOS关键词	TIBETAN PLATEAU ; DUNE MOBILITY ; DEEP-SEA ; CHINA ; CLIMATE ; LOESS ; DEPOSITION ; EVOLUTION ; ISOTOPES ; GLACIERS
WOS类目	Geology
WOS研究方向	Geology
EI主题词	2020-01-01
来源机构	中国科学院地质与地球物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312072
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, CM2, Shenzhen 518055, Guangdong, Peoples R China; 4.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia; 5.IGME, Unidad IGME Zaragoza, C Manuel Lasala 44 9 B, Zaragoza 50006, Spain; 6.CSIC, Inst Earth Sci Jaume Almera ICTJA, C Sole i Sabaris S-N, E-08028 Barcelona, Spain; 7.MNR, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qiang,Liu, Qingsong,Roberts, Andrew P.,et al. Mechanism for enhanced eolian dust flux recorded in North Pacific Ocean sediments since 4.0 Ma: Aridity or humidity at dust source areas in the Asian interior?[J]. 中国科学院地质与地球物理研究所,2020,48(1):77-81.
APA	Zhang, Qiang,Liu, Qingsong,Roberts, Andrew P.,Larrasoana, Juan C.,Shi, Xuefa,&Jin, Chunsheng.(2020).Mechanism for enhanced eolian dust flux recorded in North Pacific Ocean sediments since 4.0 Ma: Aridity or humidity at dust source areas in the Asian interior?.GEOLOGY,48(1),77-81.
MLA	Zhang, Qiang,et al."Mechanism for enhanced eolian dust flux recorded in North Pacific Ocean sediments since 4.0 Ma: Aridity or humidity at dust source areas in the Asian interior?".GEOLOGY 48.1(2020):77-81.