气候变化领域集成服务门户(CCPortal): Replacement Times of a Spectrum of Elements in the North Atlantic Based on Thorium Supply

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DOI	10.1029/2017GB005839
	Replacement Times of a Spectrum of Elements in the North Atlantic Based on Thorium Supply
	Hayes C.T.; Anderson R.F.; Cheng H.; Conway T.M.; Edwards R.L.; Fleisher M.Q.; Ho P.; Huang K.-F.; John S.G.; Landing W.M.; Little S.H.; Lu Y.; Morton P.L.; Moran S.B.; Robinson L.F.; Shelley R.U.; Shiller A.M.; Zheng X.-Y.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1294
结束页码	1311
卷号	32 期号:9
英文摘要	The measurable supply of 232Th to the ocean can be used to derive the supply of other elements, which is more difficult to quantify directly. The measured inventory of an element divided by the derived supply yields a replacement time estimate, which in special circumstances is related to a residence time. As a proof of concept, Th-based supply rates imply a range in the replacement times of the rare earth elements in the North Atlantic that is consistent with the chemical reactivity of rare earth elements related to their ionic charge density. Similar estimates of replacement times for the bioactive trace elements (Fe, Mn, Zn, Cd, Cu, and Co), ranging from <5 years to >50,000 years, demonstrate the broad range of elemental reactivity in the ocean. Here we discuss how variations in source composition, fractional solubility ratios, or noncontinental sources, such as hydrothermal vents, lead to uncertainties in Th-based replacement time estimates. We show that the constraints on oceanic replacement time provided by the Th-based calculations are broadly applicable in predicting how elements are distributed in the ocean and for some elements, such as Fe, may inform us on how the carbon cycle may be impacted by trace element supply and removal. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	geochemistry; GEOTRACES; residence times; trace metals
语种	英语
scopus关键词	carbon cycle; fractionation; geochemistry; hydrothermal vent; nutrient availability; replacement; residence time; solubility; thorium isotope; trace element; Atlantic Ocean; Atlantic Ocean (North)
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129800
作者单位	School of Ocean Science and Engineering, University of Southern Mississippi, Stennis Space Center, MS, United States; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China; Department of Earth Sciences, University of Minnesota, Minneapolis, MN, United States; College of Marine Science and School of Geosciences, University of South Florida, St. Petersburg, FL, United States; Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL, United States; Department of Earth Science and Engineering, Royal School of Mines, Imperial College London, London, United Kingdom; Earth Observatory of Singapore, Singapore; C...
推荐引用方式 GB/T 7714	Hayes C.T.,Anderson R.F.,Cheng H.,et al. Replacement Times of a Spectrum of Elements in the North Atlantic Based on Thorium Supply[J],2018,32(9).
APA	Hayes C.T..,Anderson R.F..,Cheng H..,Conway T.M..,Edwards R.L..,...&Zheng X.-Y..(2018).Replacement Times of a Spectrum of Elements in the North Atlantic Based on Thorium Supply.Global Biogeochemical Cycles,32(9).
MLA	Hayes C.T.,et al."Replacement Times of a Spectrum of Elements in the North Atlantic Based on Thorium Supply".Global Biogeochemical Cycles 32.9(2018).