Measurement and Predictability of Local Convective Rainfall

局地对流降雨的测量和预报

• 批准号: 9219674
• 负责人: Konstantine Georgakakos
• 金额: $ 15.71万
• 依托单位: University of Iowa
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219674&HistoricalAwards=false
• 关键词: Measurement; Predictability; Local; Convective; Rainfall

This study addresses measurement of local convective surface rainfall and attendant surface and boundary layer atmospheric variables, on the creation of a prototype database for fundamental studies on rainfall properties and dynamics, and on the determination of predictability properties of local surface convective rainfall. The significance for hydrology is that the study will: (1) enhance the hydrologic database of rainfall and other storm data with very-fine resolution data with beneficial consequences for studies on the statistical and dynamical properties of surface rainfall and its extremes, (2) assess the fundamental dynamical and microphysical mechanisms at work during the occurrence of heavy surface rainfall with beneficial consequences for efforts devoted to dynamical parameterizations, (3) provide predictability measures that would be very beneficial for hydrologic studies of hazardous flood events. A host of specially calibrated instruments for surface meteorological measurements, including very sensitive optical raingauges and a phased array wind profiler will be used for measurement of convective events in three locations in Iowa City, Iowa during four spring and summer months of each of the two project years. The quality-controlled data will be used to create a prototype database that would be made available (together with documentation) to the scientific community for fundamental studies. The data will also be used to aid in the formulation of mathematical models of heavy rainfall that are physics-based and consistent with the observed temporal features of the process and that could be used to assess the predictability properties of local surface rainfall.//

本研究探讨局部对流地面的量测 降雨和伴随的地面和边界层大气 变量，建立一个原型数据库的基本 降雨特性和动力学的研究，以及 局部地表可预报性的确定 对流降雨 对水文学的意义在于， 研究将：（1）加强降雨水文数据库， 其他风暴数据与非常精细的分辨率数据， 对统计和动力学研究的影响 地面降雨及其极端情况的性质，（2）评估 基本的动力学和微观物理机制在工作中， 地面强降雨的发生， 致力于动态参数化的努力的结果， (3)提供可预测性的措施， 用于危险洪水事件的水文研究。 一系列 地面气象专用校准仪器 测量，包括非常敏感的光学雨量计和 相控阵风廓线仪将用于测量 四年中爱荷华州爱荷华州三个地点的对流事件 两个项目年度每年的春季和夏季月份。 的 质量控制数据将用于创建原型数据库 将（连同文件）提供给 科学界的基础研究。 数据还将 可以用来帮助制定数学模型的沉重 降雨量是基于物理的，与观测到的一致 的时间特征，并可用于评估 当地地表降雨的可预报性。