气候变化领域集成服务门户(CCPortal): Insights From the 238 U- 234 Th Method Into the Coupling of Biological Export and the Cycling of Cadmium, Cobalt, and Manganese in the Southeast Pacific Ocean

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DOI	10.1029/2018GB005985
	Insights From the 238 U- 234 Th Method Into the Coupling of Biological Export and the Cycling of Cadmium, Cobalt, and Manganese in the Southeast Pacific Ocean
	Black E.E.; Lam P.J.; Lee J.-M.; Buesseler K.O.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	15
结束页码	36
卷号	33 期号:1
英文摘要	Better constraints on the magnitude of particulate export and the residence times of trace elements are required to understand marine food web dynamics, track the transport of anthropogenic trace metals in the ocean, and improve global climate models. While prior studies have been successful in constructing basin-scale budgets of elements like carbon in the upper ocean, the cycling of particulate trace metals is poorly understood. The 238 U- 234 Th method is used here with data from the GP-16 GEOTRACES transect to investigate the upper ocean processes controlling the particulate export of cadmium, cobalt, and manganese in the southeastern Pacific. Patterns in the flux data indicated that particulate cadmium and cobalt behave similarly to particulate phosphorus and organic carbon, with the highest export in the productive coastal region and decreasing flux with depth due to remineralization. The export of manganese was influenced by redox conditions at the low oxygen coastal stations and by precipitation and/or scavenging elsewhere. Residence times with respect to export (total inventory divided by particulate flux) for phosphorus, cadmium, cobalt, and manganese in the upper 100 and 200 m were determined to be on the order of months to years. These GEOTRACES-based synthesis efforts, combining a host of concentration and tracer data with unprecedented resolution, will help to close the oceanic budgets of trace metals. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	export; residence time; thorium; trace metals
语种	英语
scopus关键词	cadmium; cobalt; concentration (composition); food web; global climate; manganese; marine environment; precipitation (chemistry); redox conditions; residence time; scavenging (chemistry); thorium; trace metal; upper ocean; uranium isotope; Pacific Ocean; Pacific Ocean (Southeast)
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/129764
作者单位	Ocean Frontier Institute, Dalhousie University, Halifax, NS, Canada; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Ocean Sciences Department, Institute of Marine Sciences, University of California, Santa Cruz, CA, United States
推荐引用方式 GB/T 7714	Black E.E.,Lam P.J.,Lee J.-M.,et al. Insights From the 238 U- 234 Th Method Into the Coupling of Biological Export and the Cycling of Cadmium, Cobalt, and Manganese in the Southeast Pacific Ocean[J],2019,33(1).
APA	Black E.E.,Lam P.J.,Lee J.-M.,&Buesseler K.O..(2019).Insights From the 238 U- 234 Th Method Into the Coupling of Biological Export and the Cycling of Cadmium, Cobalt, and Manganese in the Southeast Pacific Ocean.Global Biogeochemical Cycles,33(1).
MLA	Black E.E.,et al."Insights From the 238 U- 234 Th Method Into the Coupling of Biological Export and the Cycling of Cadmium, Cobalt, and Manganese in the Southeast Pacific Ocean".Global Biogeochemical Cycles 33.1(2019).