气候变化领域集成服务门户(CCPortal): The influence of deep water circulation on the distribution of 231Pa and 230Th in the Pacific Ocean

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DOI	10.1016/j.epsl.2020.116674
	The influence of deep water circulation on the distribution of 231Pa and 230Th in the Pacific Ocean
	Luo Y.; Lippold J.; Allen S.E.; Tjiputra J.; Jaccard S.L.; Francois R.
发表日期	2021
ISSN	0012821X
卷号	554
英文摘要	Sedimentary 231Pa/230Th ratios have been used in the Atlantic Ocean as a proxy to reconstruct past changes in the strength and geometry of the Atlantic Meridional Overturning Circulation (AMOC), stemming from the southward export of 231Pa by the North Atlantic Deep Water (NADW). However, deep waters in the Pacific Ocean have a longer residence time, so that Pacific sedimentary 231Pa/230Th ratios are more strongly affected by particle/boundary scavenging, which obscures the influence of deep water circulation. The goal of this study is to examine how the Pacific Meridional Overturning Circulation (PMOC) affects the distribution of 231Pa and 230Th in the water column and sediment of the Pacific Ocean, and to explore whether sedimentary 231Pa/230Th ratios could provide useful constraints on past changes of the deep Pacific circulation. We examine the existing Pacific sedimentary 231Pa/230Th database and demonstrate that the Pacific Meridional Overturning Circulation (PMOC) has a distinctive influence on the distribution of sedimentary 231Pa/230Th. Using a 2D scavenging model with a simplified representation of the Pacific deep water circulation, we show that Pacific sedimentary 231Pa/230Th could potentially provide information on past variability in PMOC. © 2020 Elsevier B.V.
关键词	230Th 231Pa Pacific paleocirculation PMOC
英文关键词	Distributed database systems; Residence time distribution; Sedimentology; Atlantic meridional overturning circulations; Atlantic Ocean; North Atlantic Deep Water; Pacific meridional overturning circulation; Pacific ocean; Residence time; Scavenging model; Water columns; Oceanography; atmospheric circulation; deep water; marine sediment; protactinium; thorium isotope; water column; Pacific Ocean
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203203
作者单位	School of Marine Sciences, Sun Yat-Sen University, SYSU, B311 Main Building, Zhuhai, Guangdong 519082, China; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T1Z4, Canada; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, China; State Key Laboratory of Marine Geology, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Institute of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 234, Heidelberg, 69120, Germany; NORCE Climate, Bjerknes Centre for Climate Research, Jahnebakken 5, Bergen, 5007, Norway; Institute of Geological Sciences, Oeschger Center for Climate Change Research, University of Bern, Bern, 3012, Switzerland; Institute of Earth Sciences, University of Lausanne, Lausanne, 1015, Switzerland
推荐引用方式 GB/T 7714	Luo Y.,Lippold J.,Allen S.E.,et al. The influence of deep water circulation on the distribution of 231Pa and 230Th in the Pacific Ocean[J],2021,554.
APA	Luo Y.,Lippold J.,Allen S.E.,Tjiputra J.,Jaccard S.L.,&Francois R..(2021).The influence of deep water circulation on the distribution of 231Pa and 230Th in the Pacific Ocean.Earth and Planetary Science Letters,554.
MLA	Luo Y.,et al."The influence of deep water circulation on the distribution of 231Pa and 230Th in the Pacific Ocean".Earth and Planetary Science Letters 554(2021).