Distributions and sea-to-air fluxes of volatile halocarbons in the southern Yellow Sea and the East China Sea
Distributions and sea-to-air fluxes of volatile halocarbons in the southern Yellow Sea and the East China Sea
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DOI：
10.1007/s13131-015-0622-y
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发表时间：
2015-02
影响因子：
1.4
通讯作者：
Guipeng Yang;Li Li-Li;Xiao-lan Lu;Liang Zhang
中科院分区：
文献类型：
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作者：
Guipeng Yang;Li Li-Li;Xiao-lan Lu;Liang Zhang
2007年11月，对黄海南部和东海5种挥发性卤代烃（vhc）的分布和海气通量进行了研究。结果表明：地表水中1,1,1-三氯乙烷（C2H3Cl3）、1,1-二氯乙烷（C2H2Cl2）、1,1,2-三氯乙烷（C2HCl3）、三氯甲烷（CHCl3）和四氯甲烷（CCl4）的浓度分别为0.31 ~ 4.81、2.75 ~ 21.3、1.21 ~ 17.1、5.02 ~ 233和0.045 ~ 4.47 pmol/L，平均值分别为1.89、12.20、6.93、60.90和0.33 pmol/L。总体上，C2H3Cl3、c2h2cl2和ccl4的水平分布主要受人为活动的影响，而c2hcl3和chcl3受生物因子和人为活动的影响。研究区vhc浓度（除C2HCl3外）呈现由近岸向近海递减的趋势，在近岸水域较高。计算得到C2H3Cl3、C2HCl3、chcl3和ccl4的海气通量分别为−56.00 -(−5.68)、−7.31-123.42、148.00-1 309.31和−83.32 -(−1.53)nmol/(m2·d)，平均值分别为−6.77、17.14、183.38和−21.27 nmol/（m2·d）。数据表明，秋季SYS和ECS是大气中c2hcl3和CCl4的汇，而c2hcl3和chcl3是大气中的源。
Distributions and sea-to-air fluxes of five kinds of volatile halocarbons (VHCs) were studied in the southern Yellow Sea (SYS) and the East China Sea (ECS) in November 2007. The results showed that the concentrations of 1,1,1-trichloroethane (C2H3Cl3), 1,1-dichloroethene (C2H2Cl2), 1,1,2-trichloroethene (C2HCl3), trichloromethane (CHCl3) and tetrachloromethane (CCl4) in the surface water were 0.31–4.81, 2.75–21.3, 1.21–17.1, 5.02–233 and 0.045–4.47 pmol/L, respectively, with the average values of 1.89, 12.20, 6.93, 60.90 and 0.33 pmol/L. On the whole, the horizontal distributions of C2H3Cl3, C2H2Cl2and CCl4were affected mainly by anthropogenic activities, while C2HCl3and CHCl3were influenced by biological factors as well as anthropogenic activities. In the study area, the concentrations of VHCs (except C2HCl3) exhibited a decreasing trend from inshore to offshore sites, with the higher values occurring in the coastal waters. The sea-to-air fluxes of C2H3Cl3, C2HCl3, CHCl3and CCl4were calculated to be −56.00–(−5.68), −7.31–123.42, 148.00–1 309.31 and −83.32–(−1.53) nmol/(m2·d), respectively, with the average values of −6.77, 17.14, 183.38 and −21.27 nmol/(m2·d). Our data showed that the SYS and ECS in autumn was a sink for C2H3Cl3and CCl4, while it was a source for C2HCl3and CHCl3in the atmosphere.