| 2014年与2015年夏季琼东上升流的年际变化及其成因分析 |
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| 引用本文： | 李凯,高璐,董旭,潘爱军,王维波,万小芳.2014年与2015年夏季琼东上升流的年际变化及其成因分析[J].海洋学报,2019,41(1):1-10. |
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| 作者姓名： | 李凯 高璐 董旭 潘爱军 王维波 万小芳 |
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| 作者单位： | 自然资源部第三海洋研究所, 福建 厦门 361005 |
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| 基金项目： | 海洋三所基本科研业务费项目（海三科2016024，海三科2016025）；国家重点研发计划（2017YFC1405100）。 |
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| 摘 要： | 本文通过2014年与2015年7月琼东海域的现场调查资料，结合卫星遥感数据，对ENSO影响下琼东上升流的变化进行研究分析，结果表明:2015年为强厄尔尼诺年，2015年7月低温高盐水总体上离表层较深，大约为20~30 m（24.5℃等温线和34等盐线），但在近岸处（离岸20 km以内）却相对较浅，24.5℃等温线和34等盐线在整个断面抬升15~25 m，上升流的爬升现象更为明显；受西南季风影响，表层海水离岸运动，低温高盐水沿地形爬升进行补充，是典型的风生上升流。2014年为正常年份，2014年7月，整个断面低温高盐水更接近表层（近岸例外），大约为10~20 m，同等深度低温高盐现象比2015年明显，但上升流爬升现象不明显，24.5℃等温线和34等盐线在整个断面抬升不到10 m；盛行风为东南风、向岸风，对上升流的形成起抑制作用，低温高盐水使整个断面的抬升，不符合风生上升流的特征规律，表明该年琼东上升流的形成可能与外海环流变化导致的温跃层抬升有关。
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| 关 键 词： | ENSO 琼东上升流 低温高盐 |
| 收稿时间： | 2017/12/5 0:00:00 |
| 修稿时间： | 2018/3/14 0:00:00 |
The interannual variation and preliminary analysis of upwelling in eastern Hainan Island in summer of 2014 and 2015 |
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| Li Kai,Gao Lu,Dong Xu,Pan Aijun,Wang Weibo and Wan Xiaofang.The interannual variation and preliminary analysis of upwelling in eastern Hainan Island in summer of 2014 and 2015[J].Acta Oceanologica Sinica (in Chinese),2019,41(1):1-10. |
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| Authors: | Li Kai Gao Lu Dong Xu Pan Aijun Wang Weibo and Wan Xiaofang |
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| Institution: | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China |
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| Abstract: | On the basis of spot investigation data and satellite remote sensing data in eastern Hainan Island of July 2014 and 2015, we investigated the variation of upwelling in eastern Hainan Island under the influence of ENSO. Results show that 2015 is a strong El Niño year, and the low temperature, high salinity water is deeper from the surface than 2014, but more shallow in the offshore, and the climbing phenomenon of the upwelling is more obvious. The 27.5℃ isothermal of temperature and the 34 isograms of salinity can climb up to 15-25 m in the whole section. Influenced by southwesterly wind, the low temperature-high salinity water climb up along the terrain, which is the typically wind-driven upwelling. 2014 is a normal year, the low temperature-high salinity water is more shallow from the surface than 2015 (except the offshore), the low temperature-high salinity phenomenon is more obvious than 2015 in the same depth, but the climb phenomenon of the upwelling is not obvious. The 27.5℃ isothermal of temperature and the 34 isograms of salinity climb in less than 10 m. Prevailing wind is southeasterly wind, which suppresses the form of upwelling. The low temperature-high salinity water lifting is formed on the whole terrain, which is not suit to the characteristic of the typically wind-driven upwelling. This shows that the form of upwelling in eastern Hainan Island in 2014 may be associated with the thermocline lift caused by circulation changes off the coast. |
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| Keywords: | ENSO the upwelling in eastern Hainan Island low temperature-high salinity |
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