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盛夏南海的水文与环流特征:2000年8月航次再探
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作者 李立 许金电 《海洋学报》 CAS CSCD 北大核心 2021年第6期1-12,共12页
在国家重点基础研究发展规划的支持下,2000年8月在南海组织了1次多船同步海洋学调查,是迄今为止盛夏期间唯一一次全海盆准同步水文观测。航次间遭遇的多种困难虽被及时化解,然而观测数据的质量已受影响。此前虽已有若干相关研究发表,但... 在国家重点基础研究发展规划的支持下,2000年8月在南海组织了1次多船同步海洋学调查,是迄今为止盛夏期间唯一一次全海盆准同步水文观测。航次间遭遇的多种困难虽被及时化解,然而观测数据的质量已受影响。此前虽已有若干相关研究发表,但未见对观测数据进行质量控制和全面的分析。本文在对CTD和ADCP原始数据仔细校正的基础上,分析和讨论了盛夏期间南海海盆的水文和环流特征,冀留下尽可能完整的记录。分析表明,盛夏期间以海盆SW−NE向轴线为界,南海展现出不同的物理特征。轴线东南受季节性反气旋环流控制,其中次海盆尺度的南沙反气旋环流尤其强大;轴线西北则受各种中尺度现象支配,未见明显的大尺度环流结构。研究证实南沙反气旋环流的水平尺度超过400 km,垂直尺度达近千米,最大流速近1 m/s,是夏季南海最突出的环流特征,但发现其位置和强度存在显著的年际变化。研究并发现,不同于以往的认识,观测期间民都洛海峡交换呈“三明治”结构,表明随强迫条件变化,民都洛海峡交换可出现不同模态。 展开更多
关键词 南海 夏季环流 南沙反气旋环流 民都洛海峡
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Water Masses in the South China Sea and Water Exchange between the Pacific and the South China Sea 被引量:8
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作者 LIFengqi LILei +1 位作者 WANGXiuqin LIUChangle 《Journal of Ocean University of Qingdao》 2002年第1期19-24,共6页
Water masses in the South China Sea (SCS) were identified and analyzed with the data collected in the summer and winter of 1998. The distributions of temperature and salinity near the Bashi Channel (the Luzon Strait) ... Water masses in the South China Sea (SCS) were identified and analyzed with the data collected in the summer and winter of 1998. The distributions of temperature and salinity near the Bashi Channel (the Luzon Strait) were analyzed by using the data obtained in July and December of 1997. Based on the results from the data collected in the winter of 1998, waters in the open sea areas of the SCS were divided into six water masses: the Surface Water Mass of the SCS (S), the Subsurface Water Mass of the SCS (U), the Subsurface-Intermediate Water Mass of the SCS (UI),the Intermediate Water Mass of the SCS (I), the Deep Water Mass of the SCS (D) and the Bottom Water Mass of the SCS(B). For the summer of 1998, the Kuroshio Surface Water Mass (KS) and the Kuroshio Subsurface Water Mass (KU) were also identified in the SCS. But no Kuroshio water was found to pass the 119.5°E meridian and enter the SCS in the time of winter observations. The Sulu Sea Water (SSW) intruded into the SCS through the Mindoro Channel between 50-75 m in the summer of 1998. However, the data obtained in the summer and winter of 1997 indicated that water from the Pacific had entered the SCS through the nor-thern part of the Luzon Strait in these seasons, but water from the SCS had entered the Pacific through the southern part of the Strait. These phenomena might correlate with the 1998 El-Nio event. 展开更多
关键词 the South China Sea water mass Luzon Strait (Bashi Channel) Mindoro Channel water exchange
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