Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003

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	Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003
	Chen, Min ; Ma, Qiang ; Guo, Laodong ; Qiu, Yusheng ; Li, Yanping ; Yang, Weifeng ; Chen M(陈敏) ; Yang WF(杨伟锋)
刊名	http://dx.doi.org/10.1016/j.dsr2.2012.03.011
	2012-12-15
关键词	PARTICULATE ORGANIC-CARBON WESTERN ARCTIC-OCEAN MIDDLE ATLANTIC BIGHT CONTINENTAL-MARGIN CANADA BASIN BERING-SEA BIOLOGICAL PRODUCTIVITY SURFACE WATERS EXPORT FLUXES POC EXPORT
英文摘要	Chinese IPY Research Program; National Natural Science Foundation of China [41125020]; Fujian Natural Science Foundation [2009J06026]; State Oceanic Administration of China [201105022-4]; Ministry of Education of China; Activity concentrations of dissolved and particulate Pb-210 and Ra-226 in the water column were measured in the eastern Chukchi Sea during summer 2003. Th-234/U-238 disequilibria were used to estimate the scavenging fluxes of Pb-210 from the water column to the underlying sediments. Our results showed that concentrations of Pb-210 and its distributions were mainly influenced by mixing processes of water masses and sediment resuspension. The residence times of Pb-210 in the eastern Chukchi Sea ranged from 5 to 103 d. Short residence times were mostly observed at the shelf stations, indicating a more effective particle scavenging in the shelf region. A mass balance model was constructed to evaluate the contribution of lateral transport to Pb-210 budget in the water column. The lateral transport fluxes of Pb-210 ranged from 17 to 177 Bq/m(2)/a, comprising up to 63-94% of the total supply of Pb-210 in the eastern Chukchi Sea. We hypothesize that the accumulative removal of Pb-210 in the Pacific inflow waters during their transport across the Chukchi Sea and the import of Pb-210 from sea ice rafted sediments are the two major lateral transport pathways for the import of Pb-210 to the eastern Chukchi Sea. Our results highlight the importance of lateral transport processes to the geographical distribution of particle-reactive elements and their biogeochemical cycles in the Arctic Ocean. (C) 2012 Elsevier Ltd. All rights reserved.
语种	英语
出版者	DEEP-SEA RES PT II
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87847]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Chen, Min,Ma, Qiang,Guo, Laodong,et al. Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003[J]. http://dx.doi.org/10.1016/j.dsr2.2012.03.011,2012.
APA	Chen, Min.,Ma, Qiang.,Guo, Laodong.,Qiu, Yusheng.,Li, Yanping.,...&杨伟锋.(2012).Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003.http://dx.doi.org/10.1016/j.dsr2.2012.03.011.
MLA	Chen, Min,et al."Importance of lateral transport processes to Pb-210 budget in the eastern Chukchi Sea during summer 2003".http://dx.doi.org/10.1016/j.dsr2.2012.03.011 (2012).