DOI: 10.1002/2014GB004939
Scopus记录号: 2-s2.0-84916936755
论文题名: Six centuries of changing oceanic mercury
作者: Zhang Y ; , Jaeglé L ; , Thompson L ; , Streets D ; G
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 11 起始页码: 1251
结束页码: 1261
语种: 英语
英文关键词: Anthropocene
; Anthropogenic perturbation
; Atmosphere
; Lake sediment
; Mercury
; Ocean
Scopus关键词: anthropogenic effect
; atmospheric pollution
; biogeochemical cycle
; food consumption
; global ocean
; health impact
; lacustrine deposit
; marine sediment
; mercury (element)
; mining
; public health
英文摘要: Mercury (Hg) is a global and persistent contaminant, affecting human health primarily via marine fish consumption. Large anthropogenic releases of Hg to the atmosphere by mining and coal combustion have resulted in a significant perturbation to the biogeochemical cycling of Hg. The magnitude of this perturbation and the relative roles of the ocean and land as sinks for anthropogenic Hg remain unclear. Here we use a 3-D global ocean biogeochemical model to show that surface ocean Hg concentrations have increased fourfold over the last 600 years. We find that anthropogenic Hg enters the ocean's interior predominantly by absorption onto sinking organic matter particulates, which decompose and release Hg at a depth of 500-800m, implying that the human perturbation is largest in subsurface waters of biologically productive regions. Our model simulation predicts that over the last six centuries half of emitted anthropogenic Hg has accumulated in the oceans and marine sediments. ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77535
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; School of Oceanography, University of Washington, Seattle, WA, United States; Decision and Information Sciences Division, Argonne National Laboratory, Argonne, IL, United States
Recommended Citation:
Zhang Y,, Jaeglé L,, Thompson L,et al. Six centuries of changing oceanic mercury[J]. Global Biogeochemical Cycles,2014-01-01,28(11)