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学科主题: Meteorology & Atmospheric Sciences
题名: Mercury in the marine boundary layer and seawater of the South China Sea: Concentrations, sea/air flux, and implication for land outflow
作者: Fu, XW ; Feng, XB ; Zhang, G ; Xu, WH ; Li, XD ; Yao, H ; Liang, P ; Li, J ; Sommar, J ; Yin, RS ; Liu, N
通讯作者: fengxinbin@vip.skleg.cn
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
发表日期: 2010
卷: 115, 页:#NAME
收录类别: sci
部门归属: [Fu, Xuewu; Feng, Xinbin; Yao, Hen; Liang, Peng; Sommar, Jonas; Yin, Runsheng; Liu, Na] Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550002, Peoples R China; [Zhang, Gan; Li, Jun] Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China; [Xu, Weihai; Li, Xiangdong] Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China; [Xu, Weihai] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Yao, Hen; Liang, Peng; Yin, Runsheng; Liu, Na] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
项目归属: 海洋地质
摘要: Using R/V Shiyan 3 as a sampling platform, measurements of gaseous elemental mercury (GEM), surface seawater total mercury (THg), methyl mercury (MeHg), and dissolved gaseous mercury (DGM) were carried out above and in the South China Sea (SCS). Measurements were collected for 2 weeks (10 to 28 August 2007) during an oceanographic expedition, which circumnavigated the northern SCS from Guangzhou (Canton), Hainan Inland, the Philippines, and back to Guangzhou. GEM concentrations over the northern SCS ranged from 1.04 to 6.75 ng m(-3) (mean: 2.62 ng m(-3), median: 2.24 ng m(-3)). The spatial distribution of GEM was characterized by elevated concentrations near the coastal sites adjacent to mainland China and lower concentrations at stations in the open sea. Trajectory analysis revealed that high concentrations of GEM were generally related to air masses from south China and the Indochina peninsula, while lower concentrations of GEM were related to air masses from the open sea area, reflecting great Hg emissions from south China and Indochina peninsula. The mean concentrations of THg, MeHg, and DGM in surface seawater were 1.2 +/- 0.3 ng L-1, 0.12 +/- 0.05 ng L-1, and 36.5 +/- 14.9 pg L-1, respectively. In general, THg and MeHg levels in the northern SCS were higher compared to results reported from most other oceans/seas. Elevated THg levels in the study area were likely attributed to significant Hg delivery from surrounding areas of the SCS primarily via atmospheric deposition and riverine input, whereas other sources like in situ production by various biotic and abiotic processes may be important for MeHg. Average sea/air flux of Hg in the study area was estimated using a gas exchange method (4.5 +/- 3.4 ng m(-2) h(-1)). This value was comparable to those from other coastal areas and generally higher than those from open sea environments, which may be attributed to the reemission of Hg previously transported to this area.
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WOS记录号: WOS:000276025800002
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4332
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Fu, XW; Feng, XB; Zhang, G; Xu, WH; Li, XD; Yao, H; Liang, P; Li, J; Sommar, J; Yin, RS; Liu, N.Mercury in the marine boundary layer and seawater of the South China Sea: Concentrations, sea/air flux, and implication for land outflow,JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2010,115():#NAME
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