Storm Tracks and Low Frequency Variability

风暴路径和低频变化

• 批准号: 8920589
• 负责人: Raymond Pierrehumbert
• 金额: $ 27.97万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8920589&HistoricalAwards=false
• 关键词: Storm; Tracks; Low; Frequency; Variability

This research project involves a study of the relationship between storm tracks and the low frequency variability of the atmosphere. The main question to be considered is how synoptic eddy fluxes of heat and vorticity influence the behavior or evolution of the large scale atmospheric waves in which they are embedded. The principal investigator will also consider the extent to which large scale atmospheric flow patterns determine the position of storm tracks. A broad range of theoretical problems relating to linear and nonlinear baroclinic instability in a zonally inhomogeneous basic flow, and the attendant potential vorticity mixing, will be examined. The investigations include theoretical studies with simple models, analyses of simulations done with a general circulation model, and some analyses of observed data. These are studies of a fundamental nature with application to both weather and climate time scales. The ultimate benefit of successful research will be a better understanding (and eventually improved prediction) of weather and short term climate patterns.

这个研究项目包括研究风暴路径与大气低频变率之间的关系。要考虑的主要问题是天气涡旋的热和涡度通量如何影响它们所在的大尺度大气波的行为或演变。首席研究员还将考虑大尺度大气流动模式在多大程度上决定风暴路径的位置。广泛的理论问题，有关线性和非线性斜压不稳定在一个纬向不均匀的基本流动，以及随之而来的位涡混合，将进行审查。研究包括用简单模型进行理论研究，用一般环流模型进行模拟分析，以及对观测数据进行分析。这些都是应用于天气和气候时间尺度的基础性研究。成功研究的最终好处将是更好地理解（并最终改进预测）天气和短期气候模式。