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LI Yong,CHEN Xin,JIANG Xingyu,LI Jianfen,TIAN Lizhu. 2019. Numerical simulations and comparative analysis for two types of storm surges in the Bohai Sea using a coupled atmosphere-ocean model. Acta Oceanologica Sinica, 38(9):35-47
Numerical simulations and comparative analysis for two types of storm surges in the Bohai Sea using a coupled atmosphere-ocean model
基于海气耦合模型的渤海两种类型风暴潮数值模拟与对比分析
Received:April 18, 2018??
DOI:10.1007/s13131-019-1383-9
Key words:the Bohai Sea??extratropical storm surge??typhoon storm surge??coupled atmosphere-ocean model??WRF??ROMS
中文关键词:??渤海??温带风暴潮??台风风暴潮??海气耦合模型??WRF??ROMS
基金项目:The National Natural Science Foundation of China under contract Nos 41372173 and 51609244; the Geological Survey Projects of China Geological Survey under contract No. 121201006000182401.
Author NameAffiliationE-mail
LI Yong?Tianjin Centre, China Geological Survey, Tianjin 300170, China
Key Laboratory of Coast Geo-environment, China Geological Survey, Tianjin 300170, China?
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CHEN Xin?Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, China Agricultural University, Beijing 100083, China??
JIANG Xingyu?Tianjin Centre, China Geological Survey, Tianjin 300170, China
Key Laboratory of Coast Geo-environment, China Geological Survey, Tianjin 300170, China?
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LI Jianfen?Tianjin Centre, China Geological Survey, Tianjin 300170, China
Key Laboratory of Coast Geo-environment, China Geological Survey, Tianjin 300170, China?
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TIAN Lizhu?Tianjin Centre, China Geological Survey, Tianjin 300170, China
Key Laboratory of Coast Geo-environment, China Geological Survey, Tianjin 300170, China?
tjtlzct@163.com?
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Abstract:
??????The Bohai Sea is extremely susceptible to storm surges induced by extratropical storms and tropical cyclones in nearly every season. In order to relieve the impacts of storm surge disasters on structures and human lives in coastal regions, it is very important to understand the occurring of the severe storm surges. The previous research is mostly restricted to a single type of storm surge caused by extratropical storm or tropical cyclone. In present paper, a coupled atmosphere-ocean model is developed to study the storm surges induced by two types of extreme weather conditions. Two special cases happened in the Bohai Sea are simulated successively. The wind intensity and minimum sea-level pressure derived from the Weather Research and Forecasting (WRF) model agree well with the observed data. The computed time series of water level obtained from the Regional Ocean Modeling System (ROMS) also are in good agreement with the tide gauge observations. The structures of the wind fields and average currents for two types of storm surges are analyzed and compared. The results of coupled model are compared with those from the uncoupled model. The case studies indicate that the wind field and structure of the ocean surface current have great differences between extratropical storm surge and typhoon storm surge. The magnitude of storm surge in the Bohai Sea is shown mainly determined by the ocean surface driving force, but greatly affected by the coastal geometry and bathymetry.
中文摘要:
??????渤海一年四季都易受到由温带风暴和热带气旋所致风暴潮的影响。为了缓解风暴潮灾害对海岸地区人员生命财产的影响,十分有必要了解大型风暴潮的发生过程和机制。目前大部分研究主要局限于单一的温带风暴潮或台风风暴潮。本文利用所构建的海气耦合数值模型研究了发生于渤海的两种类型的风暴潮,对发生在渤海的2次典型强风暴潮过程进行了模拟。由WRF模型模拟得到的风场强度和最低海平面气压与实测数据吻合较好,由ROMS模型模拟得到的风暴潮期间水位变化过程与潮位站观测结果也吻合较好。对两种类型风暴潮期间的风场结钩、海面风应力、海洋表面平均流场以及水位分布进行了分析对比,并将耦合模型结果与非耦合模型结果进行了对比。研究表明,渤海两种类型风暴潮期间的风场结钩、海面风应力、海洋表面平均流场以及水位分布等均存在巨大差异。渤海风暴潮的强度主要由海洋表面的驱动力所决定,但同时也受海岸地形地貌的影响。
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