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黄、东海天气系统对渤海风暴潮影响
李健1, 侯一筠1, 莫冬雪1, 刘清容2
1.中国科学院 海洋研究所;2.国家海洋局北海预报中心
摘要:
渤海沿岸是风暴潮多发区域。研究者多关心渤海局地风引起风暴潮变化,而忽略黄、东海天气系统对渤海风暴潮的影响。为研究外围天气系统对局地风暴潮影响,本文采用实测资料对比和设计理想数值试验等方法,对黄、东海天气系统影响的渤海风暴潮进行了研究。结果表明:1、TY1814“摩羯”和TY1818“温比亚”台风风暴潮的实测资料呈现当黄、东海风力较大,而渤海风力较小时,渤海沿岸也会出现较大风暴潮现象;2、从FVCOM(Finite-Volume Coastal Ocean Model)模拟的理想数值试验中,发现黄、东海风向是东南风时,引起渤海沿岸风暴增水极值最大;3、以入海气旋和登陆北上台风两种类型天气系统风向变化设计理想数值试验,发现黄、东海的东南风持续时间对渤海沿岸风暴潮极值大小和出现时间影响较大。理想试验获得的结论不仅能为渤海风暴潮预测和防灾减灾提供理论依据,还能够有效减少预警应急中漏报的现象,降低沿海经济损失。
关键词:  渤海  风暴潮  理想试验  入海气旋  登陆北上台风
DOI:10.11693/hyhz20190900164
分类号:O141.4; P444
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
The storm surge in the Bohai Sea affected by the Yellow Sea and East China Sea weather systems
lijian1, houyijun1, modongxue1, liuqingrong2
1.IOCAS;2.NMFC
Abstract:
The coast of the Bohai Sea is a region with frequent storm surges. Researchers are more concerned about the impact of storm surge in the Bohai Sea caused by the local wind, while ignoring the impact of the storm surge caused by the wind of the Yellow Sea and East China Sea. In order to study the storm surge in the Bohai Sea caused by the wind of the Yellow Sea and East China Sea, we compared the measured data of the storm surges caused by TY1814 “Yagi” and TY1818 “Rumiba” and designed ideal tests using the FVCOM (Finite-Volume Coastal Ocean Model). The result showed the phenomenon of large storm surge along the Bohai Sea is confirmed by the comparative study of measured data, when the winds in the Yellow Sea are large and the wind in the Bohai Sea is small. By setting the ideal test of zero wind speed in the Bohai Sea and constant wind speed in the Yellow Sea and East China Sea, the influence of different wind directions on the storm surge is explored. It is found that the maximum storm surge in the Bohai Sea caused by the southeast wind in the Yellow Sea and East China Sea. At the same time, by setting the ideal test for reference changing wind directions of Cyclone to the sea and Northward typhoon after landing, it is found that the duration of the southeast wind over the yellow sea and the east China sea has great influence on the extreme value and occurrence time of the storm surge in the Bohai sea. The results provide a theoretical basis for the prediction of storm surge in the Bohai Sea and disaster prevention and mitigation. The conclusions can effectively reduce the phenomenon of missing report in forecasting and emergency, and reduce coastal economic losses.
Key words:  Bohai Sea  storm surge  ideal test  Cyclone to the sea  Northward typhoon after landing
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