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Air–sea exchange of volatile mercury in the North Atlantic Ocean
Maria E. Andersson;  Jonas Sommar;  Katarina Gårdfeldt;  Sara Jutterström
2011
发表期刊Marine Chemistry
卷号125期号:1–4页码:1-7
摘要

Part of the Beringia 2005 expedition covered the North Atlantic Ocean. During this passage, dissolved gaseous mercury (DGHg) in seawater and atmospheric concentrations of total gaseous mercury (TGHg), carbon monoxide (CO), and ozone (O3) were measured continuously at high resolution. In addition, meteorological parameters such as wind speed and water temperature were measured continuously by the ship's meteorological instrumentation. The DGHg concentration was measured using a continuous equilibrium system where the elemental mercury in the sea water was equilibrated with a stream of gas. The DGHg concentration was calculated using DGHg = Hgeq/kH′ where Hgeq is the concentration of elemental mercury in the equilibrated air and kH′ is the dimensionless Henry's law constant. The degree of saturation was determined directly from the measurements S = Hgeq/TGHg. The water sampled had an average DGHg concentration of 58 ± 10 fM and the average TGHg concentration was determined to 1.7 ± 0.1 ng m− 3. The water sampled was under- and super-saturated with respect to elemental mercury covering a large range of saturation of 70 to 230% resulting in an average degree of saturation of 150 ± 30%. Therefore, both evasion and deposition of elemental mercury were observed in the sampled water. In the light of the average flux, 2.1 ± 1.8 pmol m−2 h− 1, it is concluded that mostly evasion occured during the sampling period.

关键词Mercuryin Situ Measurementsgas Exchangefluxnorth Atlantic Oceandghgtghgwater Measurementsair Measurements
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9493
专题环境地球化学国家重点实验室
作者单位1.Department of Chemistry, University of Gothenburg, Gothenburg, Sweden
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, PR China
3.Departrment of Chemistry and Biological engineering, Chalmers University of Technology, Gothenburg, Sweden
推荐引用方式
GB/T 7714
Maria E. Andersson;Jonas Sommar;Katarina Gårdfeldt;Sara Jutterström. Air–sea exchange of volatile mercury in the North Atlantic Ocean[J]. Marine Chemistry,2011,125(1–4):1-7.
APA Maria E. Andersson;Jonas Sommar;Katarina Gårdfeldt;Sara Jutterström.(2011).Air–sea exchange of volatile mercury in the North Atlantic Ocean.Marine Chemistry,125(1–4),1-7.
MLA Maria E. Andersson;Jonas Sommar;Katarina Gårdfeldt;Sara Jutterström."Air–sea exchange of volatile mercury in the North Atlantic Ocean".Marine Chemistry 125.1–4(2011):1-7.
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