DOI: 10.1002/2015GL064051
论文题名: A decline in Arctic Ocean mercury suggested by differences in decadal trends of atmospheric mercury between the Arctic and northern midlatitudes
作者: Chen L. ; Zhang Y. ; Jacob D.J. ; Soerensen A.L. ; Fisher J.A. ; Horowitz H.M. ; Corbitt E.S. ; Wang X.
刊名: Geophysical Research Letters
ISSN: 0094-9599
EISSN: 1944-9330
出版年: 2015
卷: 42, 期: 14 起始页码: 6076
结束页码: 6083
语种: 英语
英文关键词: Arctic
; climatological variables
; mercury
; trend
Scopus关键词: Mercury (metal)
; Population statistics
; Sea ice
; Arctic
; Arctic warming
; Atmospheric mercury
; Climatological variables
; Environmental variables
; Methyl mercury
; North Atlantic
; Trend
; Oceanography
; climatology
; EOS
; mercury (element)
; midlatitude environment
; pollution exposure
; risk assessment
; sea ice
; warming
; Arctic Ocean
; Atlantic Ocean
英文摘要: Atmospheric mercury (Hg) in the Arctic shows much weaker or insignificant annual declines relative to northern midlatitudes over the past decade (2000-2009) but with strong seasonality in trends. We use a global ocean-atmosphere model of Hg (GEOS-Chem) to simulate these observed trends and determine the driving environmental variables. The atmospheric decline at northern midlatitudes can largely be explained by decreasing North Atlantic oceanic evasion. The midlatitude atmospheric signal propagates to the Arctic but is countered by rapid Arctic warming and declining sea ice, which suppresses deposition and promotes oceanic evasion over the Arctic Ocean. The resulting simulation implies a decline of Hg in the Arctic surface ocean that we estimate to be -0.67%yr-1 over the study period. Rapid Arctic warming and declining sea ice are projected for future decades and would drive a sustained decline in Arctic Ocean Hg, potentially alleviating the methylmercury exposure risk for northern populations. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938995303&doi=10.1002%2f2015GL064051&partnerID=40&md5=776f5b639fa5bed23c7f24e85e42482d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9214
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Engineering and Applied Sciences, Harvard University, Cambridge, MS, United States
Recommended Citation:
Chen L.,Zhang Y.,Jacob D.J.,et al. A decline in Arctic Ocean mercury suggested by differences in decadal trends of atmospheric mercury between the Arctic and northern midlatitudes[J]. Geophysical Research Letters,2015-01-01,42(14).