南海台风与上层海洋相互作用的数值模拟研究

本文建立了一个综合考虑大气-海流-海浪相互作用的区域海-气耦合模式系统,利用该系统模拟研究了南海台风发生发展的大气、海洋动力学机理.结果表明:耦合模式较真实地反映了台风和上层海洋的相互作用过程,提高了对台风路径和强度的模拟准确率;在台风充分发展阶段,上层海洋的反馈作用使台风路径发生左偏,并抑制了台风强度的发展;三种海洋...

A numerical simulation study on the typhoon-ocean interaction in the South China Sea

Based on the theory of atmosphere-current-wave interaction, a regional atmosphere-ocean coupling system is formed in this paper. The complicated air-sea interaction under typhoon condition in South China Sea is studied using the coupling system. The experiment results show that the coupled model exhibits good capability in simulating the typhoon process and improves the simulation accuracy of typhoon track and intensity. With the feedback mechanism of the top oceanic environmental factors such as SST, sea spray and waves, the simulated typhoon system in the coupled model is stronger and moves more leftward than that in the uncoupled atmospheric model. The three different air-sea interaction processes, sea surface temperature (SST) decline, the spray effect and ocean wave action, have different influence on the typhoon system. SST decline and ocean wave act to resist the development of typhoon, while sea spray acts in an opposite way, it enhances the typhoon development through the heat transfer at the sea surface. In the three processes, the influences of SST decline and sea spray are more important, the influence of wave is least. The impact of air-sea interaction on the development of typhoon system is not a linear summation of the three factors. There are complicate interaction mechanisms among the three. Our conclusion is that in order to better explain and predict the occurrence and evolution of the weather disasters such as typhoon and other severe weather events in South China Sea, all the air-sea interaction processes should be considered.