Diagnostic and Numerical Studies of Precursor Disturbances in Extratropical Baroclinic Development

温带斜压发展中前兆扰动的诊断和数值研究

• 批准号: 9421678
• 负责人: Daniel Keyser
• 金额: $ 33.79万
• 依托单位: SUNY at Albany
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9421678&HistoricalAwards=false
• 关键词: Diagnostic; Numerical; Studies; Precursor; Disturbances

Keyser This project involves investigations of selected aspects of the dynamics of extratropical baroclinic wave regimes, all of which will contribute to a better understanding of the process of extratropical cyclogenesis. The research will consist of both diagnostic and numerical modeling studies. Three principal activities to be undertaken are (1) analyses of ageostrophic circulations in the vicinity of upper level jet streaks and frontal zones, (2) a study of the nature of upper level precursors of cyclogenesis and the applicability of vortex dynamics, and (3) a study of the dynamics and evolution of atmospheric jet streaks using a hierarchy of numerical models. The principal investigator's view of jet streak dynamics, in particular, is quite different from the conventional view and, if shown to be correct, would radically change the atmospheric sciences community's understanding of jets. This research is important in improving understanding of the development of midlatitude storms. ***

这个项目涉及对温带斜压波系动力学的选定方面的研究，所有这些都将有助于更好地理解温带气旋发生的过程。这项研究将包括诊断性研究和数值模拟研究。将开展的三项主要活动是：(1)分析高层急流条纹和锋区附近的非地转环流；(2)研究气旋发生的高层前兆的性质和涡旋动力学的适用性；(3)利用一系列数值模式研究大气急流条纹的动力学和演变。特别是，首席研究人员对喷流条纹动力学的看法与传统观点有很大不同，如果被证明是正确的，将从根本上改变大气科学界对喷流的理解。这项研究对于增进对中纬度风暴发展的理解具有重要意义。***