气候变化领域集成服务门户(CCPortal): Deep Pacific storage of respired carbon during the last ice age: Perspectives from bottom water oxygen reconstructions

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DOI	10.1016/j.quascirev.2019.106065
	Deep Pacific storage of respired carbon during the last ice age: Perspectives from bottom water oxygen reconstructions
	Jacobel A.W.; Anderson R.F.; Jaccard S.L.; McManus J.F.; Pavia F.J.; Winckler G.
发表日期	2020
ISSN	0277-3791
卷号	230
英文摘要	Reconstructions of past changes in dissolved oxygen concentrations in the abyssal ocean are of interest to paleoceanographers because of their potential to help characterize and quantify the transfer of carbon between the atmosphere and the deep ocean. This potential, derived from the stoichiometric relationship between oxygen consumption and the regeneration of organic matter, has recently been expanded by compilations of core top observations for two proxies: the δ13C gradient between coeval infaunal and epifaunal benthic foraminifera (Δδ13C), and biomarker preservation. Here, we review these newer proxies, and the more established redox proxy authigenic uranium (aU), to critically evaluate our understanding of the controls on proxy signal production and preservation. We locate our work in the equatorial Pacific, presenting both new data and a compilation of existing records from thirty-two sediment cores to draw semi-quantitative conclusions about bottom water oxygen and respired carbon concentrations over the last glacial period. We find that the biogeochemical limitations on these proxies may be more substantial than previously appreciated, and therefore suggest several best-practice recommendations for their application. Despite the recognized data limitations, the compilation identifies the glacial Pacific Ocean as a dominant sink for CO2 at all depths below the modern oxygen minimum zone. Our review emphasizes the importance of multiproxy reconstructions, informed by site-specific records of paleoproductivity, in drawing coherent, internally consistent conclusions about glacial ocean oxygenation and carbon storage. © 2019 Elsevier Ltd
英文关键词	Carbon; Geochemical archives; Ocean carbon storage; Ocean Drilling Program; Oxygen; Paleoclimate
语种	英语
scopus关键词	Biogeochemistry; Carbon; Digital storage; Glacial geology; Oceanography; Oxygen; Repair; Benthic foraminifera; Carbon concentrations; Carbon storage; Dissolved oxygen concentrations; Geochemical archives; Ocean drilling programs; Oxygen minimum zone; Paleoclimates; Dissolved oxygen; benthic foraminifera; bottom water; deep sea; dissolved oxygen; geochemical survey; Ocean Drilling Program; oxygen consumption; oxygenation; paleoceanography; paleoclimate; Pleistocene; reconstruction; uranium isotope; Pacific Ocean; Foraminifera
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151604
作者单位	Lamont-Doherty Earth Observatory, Palisades, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Institute of Geological Sciences and Oeschger Center for Climate Change Research, University of Bern, Bern, Switzerland
推荐引用方式 GB/T 7714	Jacobel A.W.,Anderson R.F.,Jaccard S.L.,et al. Deep Pacific storage of respired carbon during the last ice age: Perspectives from bottom water oxygen reconstructions[J],2020,230.
APA	Jacobel A.W.,Anderson R.F.,Jaccard S.L.,McManus J.F.,Pavia F.J.,&Winckler G..(2020).Deep Pacific storage of respired carbon during the last ice age: Perspectives from bottom water oxygen reconstructions.Quaternary Science Reviews,230.
MLA	Jacobel A.W.,et al."Deep Pacific storage of respired carbon during the last ice age: Perspectives from bottom water oxygen reconstructions".Quaternary Science Reviews 230(2020).