气候变化领域集成服务门户(CCPortal): I/Ca in epifaunal benthic foraminifera: A semi-quantitative proxy for bottom water oxygen in a multi-proxy compilation for glacial ocean deoxygenation

CCPortal

DOI	10.1016/j.epsl.2019.116055
	I/Ca in epifaunal benthic foraminifera: A semi-quantitative proxy for bottom water oxygen in a multi-proxy compilation for glacial ocean deoxygenation
	Lu W.; Rickaby R.E.M.; Hoogakker B.A.A.; Rathburn A.E.; Burkett A.M.; Dickson A.J.; Martínez-Méndez G.; Hillenbrand C.-D.; Zhou X.; Thomas E.; Lu Z.
发表日期	2020
ISSN	0012821X
卷号	533
英文摘要	The decline in dissolved oxygen in global oceans (ocean deoxygenation) is a potential consequence of global warming which may have important impacts on ocean biogeochemistry and marine ecosystems. Current climate models do not agree on the trajectory of future deoxygenation on different timescales, in part due to uncertainties in the complex, linked effects of changes in ocean circulation, productivity and organic matter respiration. More (semi-)quantitative reconstructions of oceanic oxygen levels over the Pleistocene glacial cycles may provide a critical test of our mechanistic understanding of the response of oceanic oxygenation to climate change. Even the most promising proxies for bottom water oxygen (BWO) have limitations, which calls for new proxy development and a multi-proxy compilation to evaluate glacial ocean oxygenation. We use Holocene benthic foraminifera to explore I/Ca in Cibicidoides spp. as a BWO proxy. We propose that low I/Ca (e.g., <3 μmol/mol) in conjunction with benthic foraminiferal carbon isotope gradients and/or the surface pore area percentages in foraminiferal tests (e.g., >15%) may provide semi-quantitative estimates of low BWO in past oceans (e.g., <∼50 μmol/kg). We present I/Ca records in five cores and a global compilation of multiproxy data, indicating that bottom waters were generally less-oxygenated during glacial periods, with low O2 waters (<∼50 μmol/kg) occupying some parts of the Atlantic and Pacific Oceans. Water mass ventilation and circulation may have been important in deoxygenation of the glacial deep Pacific and South Atlantic, whereas enhanced remineralization of organic matter may have had a greater impact on reducing the oxygen content of the interior Atlantic Ocean. © 2020 Elsevier B.V.
关键词	benthic foraminifera bottom water oxygen Cibicidoides spp glacial-interglacial cycles I/Ca
英文关键词	Biochemical oxygen demand; Biogeochemistry; Calcium compounds; Climate models; Ecosystems; Glacial geology; Global warming; Microwave oscillators; Oceanography; Organic compounds; Oxygenation; Benthic foraminifera; Bottom water; Cibicidoides spp; Glacial-interglacial cycles; Ocean biogeochemistry; Ocean circulation; Pleistocene glacial; Quantitative estimates; Dissolved oxygen; benthic foraminifera; climate modeling; dissolved oxygen; glacial-interglacial cycle; Holocene; oceanic circulation; organic matter; paleoclimate; paleoenvironment; Pleistocene; Atlantic Ocean; Pacific Ocean; Cibicidoides; Foraminifera
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/202760
作者单位	Department of Earth Sciences, Syracuse University, Syracuse, NY, United States; Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; The Lyell Center, Heriot-Watt University, Edinburgh, United Kingdom; Department of Geological Sciences, California State University, Bakersfield, CA, United States; Boone Pickens School of Geology, Oklahoma State University, Stillwater, OK, United States; Department of Earth Sciences, Royal Holloway University of London, Egham, United Kingdom; MARUM – Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Germany; British Antarctic Survey, Cambridge, United Kingdom; Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ, United States; Department of Geology and Geophysics, Yale University, New Haven, CT, United States; Department of Earth and Environmental Sciences, Wesleyan University, Middletown, CT, United States
推荐引用方式 GB/T 7714	Lu W.,Rickaby R.E.M.,Hoogakker B.A.A.,et al. I/Ca in epifaunal benthic foraminifera: A semi-quantitative proxy for bottom water oxygen in a multi-proxy compilation for glacial ocean deoxygenation[J],2020,533.
APA	Lu W..,Rickaby R.E.M..,Hoogakker B.A.A..,Rathburn A.E..,Burkett A.M..,...&Lu Z..(2020).I/Ca in epifaunal benthic foraminifera: A semi-quantitative proxy for bottom water oxygen in a multi-proxy compilation for glacial ocean deoxygenation.Earth and Planetary Science Letters,533.
MLA	Lu W.,et al."I/Ca in epifaunal benthic foraminifera: A semi-quantitative proxy for bottom water oxygen in a multi-proxy compilation for glacial ocean deoxygenation".Earth and Planetary Science Letters 533(2020).