长生命史冷涡影响下天津持续多次的强对流天气的环流背景及个例模拟试验的开题报告

精品文档---下载后可任意编辑长生命史冷涡影响下天津持续多次的强对流天气的环流背景及个例模拟试验的开题报告摘要：在长生命史冷涡影响下，天津地区持续出现多次的强对流天气，其成因及机制仍不得而知。本次讨论旨在探究此类强对流天气的环流背景及个例模拟试验。通过对气象观测资料的分析，发现冷涡由北方向南移动，并在华北平原区域停滞，形成了一定的环流背景；同时，西南风流和东北风流的作用也较为重要。接着，选取 2024 年 7 月 19 日至21 日三天内发生的一次强对流天气为个例进行模拟试验，并使用WRFModel 进行封闭式数值模拟，讨论其环流背景、初始场的影响以及其他因素对模拟的影响。讨论证明，在长生命史冷涡影响下，环流背景复杂，多种因素共同作用，是该地区强对流天气的主要成因；个例模拟试验结果表明，对初始场的准确性、物理参数的选取等因素均会对数值模拟结果产生影响。Introduction：Long-lived cold eddies are common in East Asia during summer. They are characterized by a slow-moving low-pressure system of a few hundreds of kilometers wide, and a cold vortex located in its center. In recent years, strong convective weather events have occurred frequently in the Tianjin area under the influence of long-lived cold eddies. The meteorological phenomenon has brought great harm to the society. However, the cause and mechanism of these weather events are not yet known. This study aims to explore the circulation background and case simulation experiment of this type of strong convective weather, and provide a scientific basis for disaster prevention and mitigation.Research methods：This study mainly uses the WRF model to simulate a strong convective weather event that occurred in the Tianjin region from July 19 to 21, 2024. The simulation experiment focused on the impact of different atmospheric initial conditions, physical schemes, and spatial resolutions on the simulation results, as well as focused on the circulation background of the occurrence...