气候变化领域集成服务门户(CCPortal): Flux of Particulate Elements in the North Atlantic Ocean Constrained by Multiple Radionuclides

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DOI	10.1029/2018GB005994
	Flux of Particulate Elements in the North Atlantic Ocean Constrained by Multiple Radionuclides
	Hayes C.T.; Black E.E.; Anderson R.F.; Baskaran M.; Buesseler K.O.; Charette M.A.; Cheng H.; Cochran J.K.; Edwards R.L.; Fitzgerald P.; Lam P.J.; Lu Y.; Morris S.O.; Ohnemus D.C.; Pavia F.J.; Stewart G.; Tang Y.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1738
结束页码	1758
卷号	32 期号:12
英文摘要	Sinking particles strongly regulate the distribution of reactive chemical substances in the ocean, including particulate organic carbon and other elements (e.g., P, Cd, Mn, Cu, Co, Fe, Al, and 232 Th). Yet, the sinking fluxes of trace elements have not been well described in the global ocean. The U.S. GEOTRACES campaign in the North Atlantic (GA03) offers the first data set in which the sinking flux of carbon and trace elements can be derived using four different radionuclide pairs ( 238 U :234 Th ;210 Pb: 210 Po; 228 Ra: 228 Th; and 234 U: 230 Th) at stations co-located with sediment trap fluxes for comparison. Particulate organic carbon, particulate P, and particulate Cd fluxes all decrease sharply with depth below the euphotic zone. Particulate Mn, Cu, and Co flux profiles display mixed behavior, some cases reflecting biotic remineralization, and other cases showing increased flux with depth. The latter may be related to either lateral input of lithogenic material or increased scavenging onto particles. Lastly, particulate Fe fluxes resemble fluxes of Al and 232 Th, which all have increasing flux with depth, indicating a dominance of lithogenic flux at depth by resuspended sediment transported laterally to the study site. In comparing flux estimates derived using different isotope pairs, differences result from different timescales of integration and particle size fractionation effects. The range in flux estimates produced by different methods provides a robust constraint on the true removal fluxes, taking into consideration the independent uncertainties associated with each method. These estimates will be valuable targets for biogeochemical modeling and may also offer insight into particle sinking processes. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	biological carbon pump; export; GEOTRACES; North Atlantic; trace metals
语种	英语
scopus关键词	biogeochemical cycle; biological pump; carbon cycle; carbon sink; global ocean; isotopic fractionation; particle size; particulate organic carbon; radionuclide; reaction kinetics; sediment trap; 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/129772
作者单位	School of Ocean Science and Engineering, University of Southern Mississippi Stennis Space CenterMS, United States; Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of Geology, Wayne State University, Detroit, MI, 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; School of Marine and Atmospheric Science, Stony Brook University, Stony Brook, NY, United States; Ocean Sciences Department, University of California, Santa Cruz, CA, United States; Earth Observatory of Singapore, Nanyang Technical University, Singapore; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States; School of Earth and Environmental Sciences, Queens College, City University of N...
推荐引用方式 GB/T 7714	Hayes C.T.,Black E.E.,Anderson R.F.,et al. Flux of Particulate Elements in the North Atlantic Ocean Constrained by Multiple Radionuclides[J],2018,32(12).
APA	Hayes C.T..,Black E.E..,Anderson R.F..,Baskaran M..,Buesseler K.O..,...&Tang Y..(2018).Flux of Particulate Elements in the North Atlantic Ocean Constrained by Multiple Radionuclides.Global Biogeochemical Cycles,32(12).
MLA	Hayes C.T.,et al."Flux of Particulate Elements in the North Atlantic Ocean Constrained by Multiple Radionuclides".Global Biogeochemical Cycles 32.12(2018).