Numerical Simulation and Analysis of Severe Storms and Mesoscale Convective Systems

强风暴和中尺度对流系统的数值模拟与分析

• 批准号: 0324324
• 负责人: William Cotton
• 金额: $ 61.36万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-11-01 至 2007-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0324324&HistoricalAwards=false
• 关键词: Numerical; Simulation; Analysis; Severe; Storms

Due to potential large economic impact as well as public safety issues, the study of atmospheric mesoscale convective systems (MCS) is a high priority topic of research. Under this award, the Principal Investigator will pursue several research tasks that involve meteorological phenomena associated with MCSs and other convective storms: o Perform a detailed observational analysis of the environment in which MCSs initiate and develop with a focus on predictability.o Perform simulations to investigate the sensitivity of MCS development to initial convective ensemble configuration in numerical models.o Examine the impacts of forward flank downdraft and rear flank downdraft cold-pool variability on mesocyclones and near-surface tornado-like vorticity in simulated supercell tornado-producing storms.o Simulate and diagnosis, using airborne Doppler radar, derecho cases (high straight line winds) observed in the Bow Echo and Mesoscale Convective Vortex Experiment (BAMEX).This research will contribute to fundamental understanding of the behavior and evolution of severe thunderstorms and MCSs. The methodological approach involves a combination of numerical simulations and diagnostic studies.Successful completion of this research will lead to better understanding which may result in better short range prediction of weather phenomena associated with severe storms and MCSs, including tornadoes, heavy rainfall, and severe winds.

由于潜在的巨大经济影响以及公共安全问题，大气中尺度对流系统（MCS）的研究是一个高度优先的研究课题。 根据该奖项，首席研究员将从事涉及与MCS和其他对流风暴相关的气象现象的几项研究任务：o对MCS开始和发展的环境进行详细的观测分析，重点是可预测性。o进行模拟，以研究MCS发展对数值模式中初始对流集合配置的敏感性。模拟超级单体龙卷风产生风暴中气旋和近地面龙卷风状涡度的前翼下沉气流和后翼下沉气流冷池变率。o使用机载多普勒雷达进行模拟和诊断，权利案件在弓形回波和中尺度对流涡旋实验（BAMEX）中观测到的（高直线风）这项研究将有助于对强雷暴和MCS的行为和演变的基本认识。 该方法包括数值模拟和诊断研究相结合，成功完成这项研究将导致更好的理解，这可能会导致更好的短期预测的天气现象与强风暴和MCS，包括龙卷风，暴雨，强风。