Storm Tracks and Low Frequency Variability

这项研究项目涉及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热和涡度通量如何影响它们所嵌入的大尺度大气波的行为或演化。首席调查员还将考虑大尺度大气流动模式决定风暴路径位置的程度。本课程将探讨与纬向非均匀基本气流中的线性和非线性斜压不稳定以及随之而来的位涡混合有关的广泛的理论问题。这些研究包括简单模式的理论研究、大气环流模式的模拟分析和一些观测资料的分析。这些研究都是基础性的研究，同时适用于天气和气候时间尺度。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。

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.