干旱区生态环境知识资源中心(Arid): The imprint of windblown dust from the North American Southwest on the California Channel Islands and Pacific Ocean sediments

Arid

DOI	10.1016/j.quascirev.2021.106934
	The imprint of windblown dust from the North American Southwest on the California Channel Islands and Pacific Ocean sediments
	Jardine, G. E.; Crocker, A. J.; Bailey, I; Cooper, M. J.; Milton, J. A.; Wilson, P. A.
通讯作者	Crocker, AJ ; Wilson, PA (corresponding author), Univ Southampton, Natl Oceanog Ctr, Waterfront Campus, Southampton SO14 3ZH, Hants, England.
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
EISSN	1873-457X
出版年	2021
卷号	261
英文摘要	Climate projections for the North American Southwest (NASW) predict an increasing frequency and duration of droughts over the 21st century in response to human-induced warming, with potentially severe economic and social consequences. The geological record provides a way to contextualise this prediction because of the past occurrence of abrupt hemispheric warming events and sustained intervals of atmospheric carbon dioxide loading equivalent to those projected for AD 2100 (between-500 and 900 ppmv). Yet, terrestrial climate archives are typically too short and incomplete to provide a full record of these events. In principle, drill cores from deep sea sediments in the eastern Pacific Ocean can be used to overcome this problem because they contain long records of continental dust and distal riverinesupplied sediments from North America. Yet our limited understanding of the provenance and transport pathways of these sediments impedes use of these marine archives for this purpose. Here we present radiogenic isotope data (Sr, Nd and Pb) from known NASW dust-producing hot spots -playa lakes in the Mojave Desert, Quaternary silts mantling the California Channel Islands and the terrigenous fraction from marine sediments of the eastern Pacific Ocean, supported by new maps of bedrock isotopic composition in the NASW. We use these and published data sets to infer the origin of playa lake silts in the Mojave Desert and the source of windblown sediments to the California Channel Islands and nearby ocean basins. Our Results rule out a significant contribution from the distal tails of either the Pacific Asian dust plume or the North African dust plume to the Quaternary Channel Island silt mantles, corroborating the suggestion that they are aeolian in origin and sourced from the NASW on the Santa Ana winds. We identify the Outer California Borderland basins as an attractive proposition for studying past dust flux and palaeoaridity in the North American Southwest. 0 2021 Elsevier Ltd. All rights reserved.
英文关键词	Present Quaternary Paleoclimatology North America Radiogenic isotopes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000653082100005
WOS关键词	TROPICAL ATLANTIC-OCEAN ; LONG-RANGE TRANSPORT ; ND-HF ISOTOPES ; RADIOGENIC SR ; MOJAVE DESERT ; MINERAL DUST ; AFRICAN DUST ; EOLIAN DEPOSITS ; ASIAN DUST ; DEEP-SEA
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351460
作者单位	[Jardine, G. E.; Crocker, A. J.; Cooper, M. J.; Milton, J. A.; Wilson, P. A.] Univ Southampton, Natl Oceanog Ctr, Waterfront Campus, Southampton SO14 3ZH, Hants, England; [Bailey, I] Univ Exeter, Cambourne Sch Mines & Environm, Penryn Campus, Penryn, Cornwall, England
推荐引用方式 GB/T 7714	Jardine, G. E.,Crocker, A. J.,Bailey, I,et al. The imprint of windblown dust from the North American Southwest on the California Channel Islands and Pacific Ocean sediments[J],2021,261.
APA	Jardine, G. E.,Crocker, A. J.,Bailey, I,Cooper, M. J.,Milton, J. A.,&Wilson, P. A..(2021).The imprint of windblown dust from the North American Southwest on the California Channel Islands and Pacific Ocean sediments.QUATERNARY SCIENCE REVIEWS,261.
MLA	Jardine, G. E.,et al."The imprint of windblown dust from the North American Southwest on the California Channel Islands and Pacific Ocean sediments".QUATERNARY SCIENCE REVIEWS 261(2021).