The Numerical Simulation of Convective Clouds and Related Phenomena

对流云及相关现象的数值模拟

• 批准号: 9633228
• 负责人: Robert Wilhelmson
• 金额: $ 70.5万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633228&HistoricalAwards=false
• 关键词: Numerical; Simulation; Convective; Clouds; Related

9633228 Wilhelmson The Principal Investigator will use existing observational data and a state of the art three-dimensional mesoscale numerical model to investigate a range of convective phenomena such as squall lines, severe storms, tornadoes, and gust fronts. Specific research objectives include: furthering the understanding of non-supercell tornadoes that form along low level air mass boundaries; investigating the role of boundary layer convergence/shear lines on the genesis of waterspouts; studying the influence of horizontal shearing instability on initiation of deep convection; examining fine-scale supercell structure and evolution; studying the factors that control convective development along colliding outflow boundaries; exploring the turret scale dynamics and entrainment within cumuli and the role of boundary layer circulations in determining horizontal convective scales. Successful completion of this research will provide basic insights into atmospheric flows and guidance to those responsible for forecasting severe weather events. ***

小行星9633228 首席研究员将利用现有的观测数据和最先进的三维中尺度数值模型来研究一系列对流现象，如飑线、强风暴、龙卷风和阵风锋。 具体的研究目标包括：进一步了解沿着低层气团边界形成的非超级单体龙卷风;调查边界层会聚/切变线对水龙卷成因的作用;研究水平切变不稳定性对深层对流形成的影响;研究细尺度超级单体结构和演变;研究控制对流发展沿着碰撞流出边界的因素;探索积云内的炮塔尺度动力学和卷吸作用以及边界层环流在确定水平对流尺度中的作用。 这项研究的成功完成将为大气流动提供基本的见解，并为那些负责预测恶劣天气事件的人提供指导。 ***