大气—海洋—海浪实时耦合模式的建立及应用

发布时间：2018-12-16 08:41

【摘要】：大气和海洋界面存在复杂的相互作用,尤其在热带气旋过程中,相互作用表现更为显著,大气和海洋、波浪的状态时刻受到彼此间相互作用而发生变化,在数值模拟中需要合理反映三者之间的耦合作用。本文采用MCT(Model Coupling Toolkit)耦合器,基于大尺度大气模型WRF、三维非结构化网格海洋模型FVCOM和第三代海浪模型SWAN,建立了大气—海洋—波浪实时耦合模式,并将模式应用于理想台风状况下的模拟。论文的主要内容及结论为:1.利用MCT耦合器,基于WRF、FVCOM和SWAN模型建立了大气—海洋—波浪实时耦合模式,实现了不同类型网格之间的数据插值和传递。三个模型间通过交换所需物理量实现实时耦合,WRF提供海表面风要素,FVCOM提供海表面温度、水位和流速,SWAN提供有效波高、波长和谱峰周期等。2.将大气—海洋—波浪实时耦合模式应用于理想热带气旋情况下的模拟。对非耦合、大气—海洋耦合、大气—波浪耦合、以及大气—海洋—波浪耦合等不同情况进行了模拟分析,认为海表面温度受到热带气旋作用降低,并反馈作用于台风,使台风强度减小。增大的海表面粗糙度也会降低热带气旋的风速。
[Abstract]:There are complex interactions between atmosphere and ocean, especially in tropical cyclones. The interaction between atmosphere and ocean, the state of waves is changed by interaction with each other at all times. In the numerical simulation, it is necessary to reasonably reflect the coupling between the three. Based on the large scale atmospheric model WRF, 3D unstructured grid ocean model FVCOM and the third generation ocean wave model SWAN, a real time coupled atmospheric ocean wave model is established by using MCT (Model Coupling Toolkit) coupler. The model is applied to the simulation of ideal typhoon. The main contents and conclusions are as follows: 1. Based on the WRF,FVCOM and SWAN models, a real-time Atmospheric ocean-wave coupling model is established by using MCT coupler, and the data interpolation and transmission between different types of meshes are realized. The three models are coupled in real time by exchanging the required physical quantities. WRF provides sea surface wind elements, FVCOM provides sea surface temperature, water level and velocity, SWAN provides effective wave height, wavelength and peak period, etc. Atmospheric-oceanic-wave real-time coupling model is applied to the simulation of ideal tropical cyclones. In this paper, the uncoupled, atmospheric and ocean coupling, atmosphere wave coupling and atmosphere ocean wave coupling are simulated and analyzed. The results show that the sea surface temperature is reduced by tropical cyclones, and that the sea surface temperature is affected by typhoon. Reduce the intensity of a typhoon. Increased sea surface roughness also reduces the wind speed of tropical cyclones.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.22;P732.6

【参考文献】