| 摘要: |
| 对2006年夏季采自南黄海和东海的海水进行了18O同位素组成的分析, 结合温度与盐度的分布, 探讨了影响研究海域海水δ18O分布的主要因素。结果表明, 南黄海和东海海水的δ18O与盐度之间具有良好的线性正相关关系, 据此确定出夏季黑潮水和陆地径流水的特征δ18O值分别为0.20‰—0.45‰和?9.85‰。依据海水δ18O的分布, 探讨了黑潮水、长江冲淡水和黄海冷水团对研究海区δ18O分布的影响, 结果显示, 夏季黑潮水仅影响到台湾东北部陆架坡折以外的海域, 其影响路径可能以气旋式涡旋的形式出现; 在长江口附近海域, 长江径流水进入东海后, 对长江口东北部海域的影响范围较其南部更为宽广, 可到达济州岛西南部。在南黄海海域, 海水δ18O的分布可清晰指示出南黄海冷水团的位置, 黄海冷水团的形成可能与冬季的黄海暖流具有一定的联系。 |
| 关键词: 南黄海, 东海, 海水18O, 水团组成 |
| DOI：10.11693/hyhz201206005005 |
| 分类号: |
| 基金项目:国家重点基础研究发展规划项目, 2005CB422305 号; 福建省自然科学基金项目, 2009J06026 号 |
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| OXYGEN ISOTOPE IN SEAWATER AND ITS HYDROLOGICAL IMPLICATION IN THE SOUTHERN YELLOW SEA AND THE EAST CHINA SEA |
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DU Jin-Qiu, CHEN Min, CAO Jian-Ping, QIU Yu-Sheng, TONG Jin-Lu, MA Qiang, YANG Jun-Hong
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College of Oceanography and Environmental Sciences, Xiamen University
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| Abstract: |
| Seawater samples were collected from the southern Yellow Sea and the East China Sea in 2006 summer for 18O measurements. Oxygen isotope was used as a conservative tracer for water mass analysis along with temperature and salinity. A positive linear relationship was observed between δ18O and salinity, and the δ18O endmembers for the Kuroshio waters and the freshwaters was assessed to be 0.20‰—0.45‰ and ?9.85‰, respectively. The distribution of δ18O was influenced by the Kuroshio Water, the Changjiang River Water and the Yellow Sea Cold Water. The Kuroshio waters occupied only the slope regions northeastern of Taiwan Island, and entered the slope with a cyclonic trajectory. The Changjiang River waters turned to the northeastern after they entered the East China Sea. Its influence in the north of the Changjiang estuary extended to the southwestern of the Jizhou Island, and was farther than those in the south. In the Southern Yellow Sea, the Yellow Sea Cold Waters were manifested high δ18O values, indicating the formation of the Yellow Sea Cold Water observed in summer was related to the Yellow Warm Current in winter. |
| Key words: The Southern Yellow Sea, The East China Sea, Oxygen isotope, Water mass |
