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Observational and model studies of synoptic current fluctuations in the Bohai Strait on the Chinese continental shelf

机译：中国大陆架环渤海海流天气波动的观测和模型研究

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摘要

Three winter storms struck the Bohai and Yellow seas in succession during February 16-25, 2017. Periodic fluctuations of sea level, currents, temperature, and salinity were recorded at a moored station deployed in the Bohai Strait. Observations also captured significant synoptic fluctuations of inflow and outflow through the Bohai Strait with maximum magnitude exceeding 50cms(-1). The sea level dropped by 1m and the bottom temperature decreased by 2.5 degrees C in 30h during these winter storms. A regional ocean model was used to investigate the prominent fluctuations of synoptic exchange flow through the Bohai Strait. The model results indicated that the Bohai and Yellow seas in their entirety responded strongly to the storm bursts and subsequent relaxation at the synoptic scale. The periodic winter storm bursts and relaxation excited the cyclonic propagation of coastal-trapped waves around the Bohai and Yellow seas. Strong periodic inflow and outflow during the passage of the three successive storms promoted water exchange between the Bohai Sea and the northern Yellow Sea. Successive winter storms might also affect the mean current structure through the Bohai Strait. The mean currents through the Bohai Strait during the studied storm period were characterized by inflow in both northern and southern parts of the strait and outflow through the middle of the strait. This arrangement is different from the traditional view of inflow via the northern channel and outflow through the southern channel.
机译：2017年2月16日至25日，连续三场冬季风暴袭击了渤海和黄海。在渤海海峡的一个停泊站记录了海平面，洋流，温度和盐度的周期性波动。观测还捕获到流经渤海海峡的明显天气波动，最大幅度超过50cms（-1）。在这些冬季风暴中，在不到30小时的时间内海平面下降了> 1m，底部温度下降了2.5摄氏度。区域海洋模型用于调查通过渤海海峡的天气交换流量的显着波动。模型结果表明，渤海和黄海整体对风暴爆发和随后的天气尺度松弛有强烈的反应。冬季周期性的暴风雨爆发和放松激发了渤海和黄海周围海浪的旋风传播。在连续三场暴风雨过后，强劲的周期性流入和流出促进了渤海和黄海北部之间的水交换。连续的冬季风暴也可能影响到渤海海峡的平均当前结构。在研究风暴期间，通过渤海海峡的平均水流的特征是在海峡北部和南部都有流入，而在海峡中部则有流出。这种安排不同于传统的从北部渠道流入和从南部渠道流出的观点。

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  • 来源
    《Ocean Dynamics》 |2019年第3期|323-351|共29页
  • 作者

    Ding Yang; Bao Xianwen; Yao Zhigang; Bi Congcong; Wan Kai; Bao Min; Jiang Zhipeng; Song Jun; Gao Jia;

  • 作者单位

    Ocean Univ China, Key Lab Phys Oceanog, Minist Educ, Qingdao, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China;

    Ocean Univ China, Key Lab Phys Oceanog, Minist Educ, Qingdao, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China|Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China;

    Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China;

    Ocean Univ China, Key Lab Phys Oceanog, Minist Educ, Qingdao, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China|Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China;

    State Ocean Adm, North China Sea Marine Engn Prospecting Inst, Qingdao, Peoples R China;

    State Ocean Adm, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Zhejiang, Peoples R China;

    Ocean Univ China, Key Lab Phys Oceanog, Minist Educ, Qingdao, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China|Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China;

    Dalian Ocean Univ, Sch Marine Sci & Environm Engn, Dalian, Peoples R China;

    Natl Marine Data & Informat Serv, Tianjin, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Bohai Strait; Synoptic fluctuation; Inflow and outflow; Winter storm; Water exchange; Coastal-trapped wave;

    机译：渤海海峡;天气波动;出入流;冬季风暴;换水;沿海陷波;

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