Studies of the Requirements for the Numerical Simulations ofMesoscale Rainbands Forced by Conditional Symmetric Instability

条件对称不稳定性驱动的中尺度雨带数值模拟要求研究

• 批准号: 8716204
• 负责人: Thomas Warner
• 金额: $ 19.87万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-11-15 至 1991-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8716204&HistoricalAwards=false
• 关键词: Studies; Requirements; Numerical; Simulations; ofMesoscale

Extratropical cyclones dominate the weather and precipitation in temperate latitudes. The precipitation pattern is often organized in a banded structure. The horizontal scales of the frontal rainbands range from a few kilometers along the cold fronts to several tens of kilometers observed in both the warm and cold sectors of a frontal system. Several theories have been put forward to explain the organization of frontal rainbands; presently the conditional symmetric instability appears capable of explaining several types of rainbands. The most important next stage in the development of this subject is the implementation of conditional symmetric instability in numerical models. Using the mesoscale model of the Pennsylvania State University, Professors Warner and Clark will examine the model characteristics required of a realistic simulation of the rainband structures. The bulk of the rainfall received in temperate latitudes is associated with the passage of either warm or cold fronts. This work, when successfully completed, represents an important step forward in the numerical prediction of mesoscale precipitation.

外来的热带气旋主宰着天气， 温带地区的降水。 降水模式 通常以带状结构组织。 水平尺度 的锋面雨带范围从几公里沿着 冷锋到几十公里的观察，在这两个 锋面系统的暖区和冷区 几种理论 已经被提出来解释前线的组织 雨带;目前的条件对称不稳定 似乎能够解释几种类型的雨带。 的 这个课题发展的下一个最重要的阶段是 条件对称不稳定性的实现 数值模型 利用宾夕法尼亚号的中尺度模式 州立大学，华纳教授和克拉克教授将研究 一个真实的模拟所需的模型特性， 雨带结构 温带地区的大部分降雨量是 与暖锋或冷锋的通过有关。这 这项工作一旦成功完成， 在中尺度降水数值预报中的应用。