基于海气耦合模型的渤海湾风暴潮数值模拟

doi:10.16183/j.cnki.jsjtu.2017.12.015

摘要/Abstract

摘要： 为了更加准确地对渤海湾沿岸的风暴潮进行数值模拟，研究构建了WRF-ROMS相耦合的海气耦合计算模型，耦合模型能在更加真实的动力环境下研究大气与海洋之间的相互作用.耦合过程中利用开源的耦合器和网格重建程序实现了海洋模式和大气模式之间实时的数据交换.基于所构建的海气耦合模型模拟了2003年10月中旬发生在渤海湾的一次典型寒潮.研究表明，海气耦合模型能够较好地模拟出渤海湾风暴潮期间温度场、风场、潮位以及潮流场的变化特征.强冷空气南下所形成的持续偏东大风是引发渤海湾寒潮的主要强迫动力，这是由渤海湾的地形以及岸线分布特点决定的.偏东持续性大风导致的风应力增水作用与天文大潮相叠加容易产生大型风暴潮，给渤海湾近岸地区的社会经济和人民生命财产带来巨大的安全隐患.

关键词: 风暴潮, 海气耦合, 渤海湾, 数值模拟

Abstract: The Bohai Bay coastal region is one of the worst seriously affected areas by the storm surge. In order to simulate the storm surge processes more accurately in this area, a coupled ocean-atmosphere model which combines weather research and forecasting (WRF) and regional ocean model system (ROMS) is proposed. The coupled model can be used to study the interaction between the atmosphere and the ocean under more realistic dynamic conditions. Real-time data exchange between the ocean model and the atmospheric model can be performed through an open-source coupler and a grid reconstruction program. Based on the coupled ocean-atmosphere model, a typical cold surge in Bohai Bay in mid-October 2003 is simulated and analyzed. The analysis indicates that the coupled ocean-atmosphere model could be well to simulate the variations of temperature field, wind field, tidal level and tidal current field during the cold surge affecting period. The strong cold air moves southward and the resulting northeast wind is the major force of the cold surge. It is mainly determined by the distribution characteristics of topography and coastline of the Bohai Bay. The combination of wind stress elevation caused by strong northeast wind and the astronomical tide can easily lead to a large storm surge, which brings a tremendous security risk to social economic status and public health.

Key words: storm surge, ocean-atmosphere coupling, Bohai Bay, numerical simulation

中图分类号:

李勇1,2，陈鑫3，田立柱1,2，李建芬1,2. 基于海气耦合模型的渤海湾风暴潮数值模拟[J]. 上海交通大学学报（自然版）, 2017, 51(12): 1512-1519.

LI Yong1,2，CHEN Xin3，TIAN Lizhu1,2，LI Jianfen1,2. Numerical Simulation of the Storm Surge in Bohai Bay Based on a Coupled Ocean-Atmosphere Model[J]. Journal of Shanghai Jiaotong University, 2017, 51(12): 1512-1519.

参考文献

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