Distributions of volatile halocarbons in the marine atmosphere and seawater of the northern South China Sea
Distributions of volatile halocarbons in the marine atmosphere and seawater of the northern South China Sea
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DOI：
10.1016/j.marchem.2020.103912
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发表时间：
2020-12
期刊：
影响因子：
3
通讯作者：
Guan-Lin Li;Yan Chen;Guipeng Yang;Zhen He
中科院分区：
文献类型：
--
作者：
Guan-Lin Li;Yan Chen;Guipeng Yang;Zhen He
2015年夏季，对南海北方海水和大气中4种挥发性卤烃（VHCs）的浓度进行了测定。CH 3 I、CH 3Br、CHBr 3和C2Cl 4的平均表层海水浓度分别为2.0、4.2、15.7和12.5 pM;平均大气浓度分别为0.4、4.1、8.0和7.2 ppt。4种VHCs的表层海水浓度在夏季受沿岸混合水、南海表层水、黑潮和琼东上升流的影响显著，而大气浓度受盛行的西南季风和来自西南亚地区的陆源污染物的影响显著。叶绿素浓度与CH 3 I和CHBr 3呈正相关，表明浮游植物是研究区这些气体的重要来源。4种VHCs的通量表明，在研究期间，NSCS是大气的净源。
Concentrations of 4 volatile halocarbons (VHCs) in seawater and atmosphere of the Northern South China Sea (NSCS) were measured during summer 2015. Mean surface seawater concentrations of CH3I, CH3Br, CHBr3, and C2Cl4were 2.0, 4.2, 15.7, and 12.5 pM, respectively; mean atmospheric concentrations were 0.4, 4.1, 8.0, and 7.2 ppt, respectively. The surface seawater concentrations of the 4 VHCs were significantly influenced by the coastal mixed water, South China Sea surface water, Kuroshio Current, and Qiongdong upwelling in summer, while atmospheric concentrations were affected by the prevailing southwest monsoon and terrigenous pollutants from the Southwest Asia region. Chl-aconcentrations were positively correlated with CH3I and CHBr3, indicating that phytoplankton were an important source of these gases in the study area. The flux of the 4 VHCs showed that the NSCS was a net source to the atmospheric during the study period.