DOI: 10.1002/2017GB005624
Scopus记录号: 2-s2.0-85028979903
论文题名: North Atlantic Deep Water formation inhibits high Arctic contamination by continental perfluorooctane sulfonate discharges
作者: Zhang X ; , Zhang Y ; , Dassuncao C ; , Lohmann R ; , Sunderland E ; M
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期: 8 起始页码: 1332
结束页码: 1343
语种: 英语
英文关键词: Arctic
; general circulation model
; North Atlantic Deep Water
; ocean circulation
; perfluorooctane sulfonate (PFOS)
; tracer
Scopus关键词: aliphatic hydrocarbon
; chemical pollutant
; climate change
; concentration (composition)
; deep water
; general circulation model
; meridional circulation
; mixed layer
; oceanic circulation
; pollutant transport
; solubility
; surfactant
; tracer
; Arctic Ocean
; Atlantic Ocean
; Atlantic Ocean (North)
; Europe
; North America
英文摘要: Perfluorooctane sulfonate (PFOS) is an aliphatic fluorinated compound with eight carbon atoms that is extremely persistent in the environment and can adversely affect human and ecological health. The stability, low reactivity, and high water solubility of PFOS combined with the North American phaseout in production around the year 2000 make it a potentially useful new tracer for ocean circulation. Here we characterize processes affecting the lifetime and accumulation of PFOS in the North Atlantic Ocean and transport to sensitive Arctic regions by developing a 3-D simulation within the MITgcm. The model captures variability in measurements across biogeographical provinces (R2 = 0.90, p = 0.01). In 2015, the North Atlantic PFOS reservoir was equivalent to 60% of cumulative inputs from the North American and European continents (1400 Mg). Cumulative inputs to the Arctic accounted for 30% of continental discharges, while the remaining 10% was transported to the tropical Atlantic and other regions. PFOS concentrations declined rapidly after 2002 in the surface mixed layer (half-life: 1–2 years) but are still increasing below 1000 m depth. During peak production years (1980–2000), plumes of PFOS-enriched seawater were transported to the sub-Arctic in energetic surface ocean currents. However, Atlantic Meridional Overturning Circulation (AMOC) and deep ocean transport returned a substantial fraction of this northward transport (20%, 530 Mg) to southern latitudes and reduced cumulative inputs to the Arctic (730 Mg) by 70%. Weakened AMOC due to climate change is thus likely to increase the magnitude of persistent bioaccumulative pollutants entering the Arctic Ocean. ©2017. 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/77714
Appears in Collections: 气候变化事实与影响
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作者单位: Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, United States; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, United States
Recommended Citation:
Zhang X,, Zhang Y,, Dassuncao C,et al. North Atlantic Deep Water formation inhibits high Arctic contamination by continental perfluorooctane sulfonate discharges[J]. Global Biogeochemical Cycles,2017-01-01,31(8)