Numerical Simulation and Analysis of Convective Storms

在春季和夏季，中尺度对流系统 最有益的降雨量，以及经济 破坏性和威胁生命的现象，如龙卷风，冰雹， 洪水和大风 中尺度对流系统是 覆盖数百个地区的雷暴集合 公里的典型尺寸，寿命超过一个 天 主要研究者提出联合观察 分析和数值模拟的方法，以进一步了解 中尺度对流系统 使用的观察数据为 那些在以前的实验中收集到的 由国家科学基金会。 研究目标包括： 1.中尺度对流系统的分析与模拟 呈现出随机的雷暴模式 目标是 确定为什么这些系统中的一些会产生这些随机的 沉淀模式，而其他的则表现出线结构。 2.使用雷达反射率场来识别 体积降雨率和其他形态特征 中尺度对流系统的一生。 3.已经注意到，一些中尺度对流系统倾向于 产生严重的风暴，大部分损失发生在 天气尺度暖锋的北侧。 校长 研究者将使用数值模拟和 观测分析，以确定什么样的对流组合， 尺度和中/天气尺度特征导致强风。 4.利用先进的数值技术， 研究者将研究 天气、中α和中β尺度。

During the Spring and Summer months, mesoscale convective systems account for most beneficial rainfall as well as economically disruptive and life-threatening phenomena such as tornadoes, hail, flash floods and high winds. Mesoscale convective systems are collections of thunderstorms that cover areas several hundreds of kilometers in typical dimension and have lifetimes of more than one day. The Principal Investigator proposes a joint observational analysis and numerical simulation approach in furthering knowledge of mesoscale convective systems. Observational data to be used are those that have been collected during previous experiments sponsored by the National Science Foundation. Among the research goals are: 1. Analysis and simulation of mesoscale convective systems which exhibit random patterns of thunderstorms. The objective is to determine why some of these systems develop these random precipitation patterns while others exhibit a line structure. 2. Use radar reflectivity fields to identify pulsations in volumetric rainfall rates and other morphological characteristics of mesoscale convective systems over their lifetimes. 3. It has been noted that some mesoscale convective systems tend to produce severe wind storms with most of the damage occurring on the north side of synoptic-scale warm fronts. The Principal Investigator will use a combination of numerical simulation and observational analyses to determine what combination of convective- scale and meso/synoptic scale features lead to severe winds. 4. Using advanced numerical techniques, the Principal Investigator will investigate the dynamical interactions between the synoptic, meso-alpha and meso-beta scale.