DOI: 10.1002/2012GB004519
Scopus记录号: 2-s2.0-84889769394
论文题名: Distribution, transport, and production of volatile halocarbons in the upper waters of the ice-covered high Arctic Ocean
作者: Karlsson A ; , Theorin M ; , Abrahamsson K
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 4 起始页码: 1246
结束页码: 1261
语种: 英语
英文关键词: Arctic Ocean
; bromoform
; distribution
; DOM
; river fraction
; volatile halocarbons
Scopus关键词: Arctic ocean
; Biological production
; Bromoform
; Different distributions
; Dissolved organic matters
; distribution
; DOM
; Halogenated compounds
; Bromine compounds
; Halogenation
; Oceanography
; Sea ice
; Surface waters
; Volatile organic compounds
; Halocarbons
; biogeochemistry
; biological production
; brine
; bromine compound
; concentration (composition)
; dissolved organic matter
; freshwater input
; halocarbon
; ice cover
; mixed layer
; sea ice
; seawater
; spatial distribution
; surface water
; volatile substance
; water column
; Alaska
; Arctic
; Arctic Ocean
; Barrow
; Svalbard
; Svalbard and Jan Mayen
; United States
英文摘要: Volatile halogenated compounds (CHBr3, CH2Br 2, CHBr2Cl, and CH2ClI) were measured in the water column and in sea ice brine across the Arctic Ocean, from Barrow, Alaska, to Svalbard, during the Beringia 2005 expedition (August-September) with RV/IB Oden. High concentrations of brominated compounds (up to 42 pmol kg-1 of bromoform) were found under multiyear ice in the surface waters over the Makarov Basin and the Lomonosov Ridge, near the North Pole. Even higher concentrations (bromoform up to 160 pmol kg-1) were found in sea ice brine. We propose that the high load of riverine dissolved organic matter that is transported in the Transpolar Drift is a main factor responsible for the high concentration of brominated volatile compounds found in sea ice brine and upper waters and that cycles of freezing and thawing during the transport enhance the transfer of halocarbons to the seawater. The iodinated compound (CH 2ClI) showed a completely different distribution with highest concentrations in water of Pacific origin in the mixed layer and upper halocline of the northern Canada Basin and over the Alpha Ridge. In the southern Canada Basin, low concentrations of halocarbons were found in upper waters. Higher concentrations in water of Pacific origin, especially on the continental shelf, indicate production in the shelf regions, likely in the Chukchi Sea and the East Siberian Sea. Key Points Novel halocarbon data collected in the entire water column in the Arctic Ocean DOM governs the halocarbon formation in central Arctic sea ice Halocarbons can be used as tracers of biological production ©2013. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77561
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigarden 4, SE-41296 Göteborg, Sweden
Recommended Citation:
Karlsson A,, Theorin M,, Abrahamsson K. Distribution, transport, and production of volatile halocarbons in the upper waters of the ice-covered high Arctic Ocean[J]. Global Biogeochemical Cycles,2013-01-01,27(4)