Temporal and spatial distributions of carbonyl sulfide, dimethyl sulfide, and carbon disulfide in seawater and marine atmosphere of the Changjiang Estuary and its adjacent East China Sea
Temporal and spatial distributions of carbonyl sulfide, dimethyl sulfide, and carbon disulfide in seawater and marine atmosphere of the Changjiang Estuary and its adjacent East China Sea
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DOI：
10.1002/lno.11065
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发表时间：
2018-10
影响因子：
4.5
通讯作者：
Rong Zhu;Guipeng Yang;Hong‐Hai Zhang
中科院分区：
文献类型：
--
作者：
Rong Zhu;Guipeng Yang;Hong‐Hai Zhang
于2016年2月22日至2016年3月15日和2016年7月3日至25日的两个航次期间，测定了长江口及其邻近海域海水和上覆大气中羰基硫（COS）、二甲基硫（DMS）和二硫化碳（CS2）的浓度。冬季海水中COS、DMS和CS2的浓度范围分别为121-388 pmol L−1、0.321-1.59 nmol L−1和10.3-46.8 pmol L−1，夏季分别为98-346 pmol L−1、0.397-9.13 nmol L−1和13.3-65.4 pmol L−1。表层海水中DMS的浓度随季节变化而变化，而COS和CS2的浓度变化不大。冬季COS、DMS和CS2的大气混合比分别为459-777 pptv、5.2-96.8 pptv和96.9-164 pptv，夏季分别为417-644 pptv、133-365 pptv和15.8-89.8 pptv。相关性分析表明，COS浓度与DMS和CS2浓度相关。冬季COS、DMS和CS2的估算通量分别为1.19-2.06 μg m−2 d−1、15.11-164.81 μg m−2 d−1和0.27 - 1.32 μg m−2 d − 1，夏季分别为0.61-0.97 μg m−2 d−1、71.76-2511 μg m−2 d−1和0.38-1.47 μg m−2 d−1。这些结果表明，研究区是一个汇COS，但作为一个源的大气DMS和CS2在研究期间。
Carbonyl sulfide (COS), dimethyl sulfide (DMS), and carbon disulfide (CS2) concentrations were determined in seawater and the overlying atmosphere of the Changjiang Estuary and the adjacent area during two cruises from 22 February 2016 to 15 March 2016 and from 03 July 2016 to 25 July 2016. The concentration ranges of COS, DMS, and CS2 in seawater during winter were 121–388 pmol L−1, 0.321–1.59 nmol L−1, and 10.3–46.8 pmol L−1, respectively, and those during summer were 98–346 pmol L−1, 0.397–9.13 nmol L−1, and 13.3–65.4 pmol L−1. The DMS concentration in surface seawater varied seasonally, whereas the COS and CS2 concentrations varied little. The atmospheric mixing ratios of COS, DMS, and CS2 were 459–777 pptv, 5.2–96.8 pptv, and 96.9–164 pptv during winter and 417–644 pptv, 133–365 pptv, and 15.8–89.8 pptv during summer, respectively. A correlation analysis revealed that COS concentration was related to the concentrations of DMS and CS2. The estimated fluxes of COS, DMS, and CS2 were in the range of 1.19–2.06 μg m−2 d−1, 15.11–164.81 μg m−2 d−1, and 0.27‐1.32 μg m−2 d−1 during winter and 0.61–0.97 μg m−2 d−1, 71.76–2511 μg m−2 d−1, and 0.38–1.47 μg m−2 d−1 during summer, respectively. These results indicate that the study area is a sink for COS, but served as a source of atmospheric DMS and CS2 during the study period.