The Structure and Evolution of Cyclones

该项目的目标是建立典型温带气旋演变的详细三维描述，特别是遮挡过程。科学界对遮挡过程的性质有许多不同的看法，其中一些观点源于最初的“挪威气旋”模型，这是挪威气象学家在本世纪初开发的一个概念模型。以前的分析不得不依赖于来自常规高空观测网络的稀疏(而且往往不充分)数据来进行诊断研究。这些结果虽然有用，但也留下了许多悬而未决的问题。在这项研究中，首席研究人员将使用最先进的中尺度数值模式来分析几个模拟气旋事件的三维结构。这些模式提供了很高的时间和空间分辨率，这将使人们能够更全面地了解气旋的演变。首席调查员打算研究海洋和大陆上气旋的演变。

The goal of this project is to establish a detailed three- dimensional description of the evolution of a typical extratropical cyclone, particularly the occlusion process. Within the scientific community there exist many different ideas about the nature of the occlusion process, a number of which stem from the original "Norwegian cyclone" model, a conceptual model developed in the early part of this century by Norwegian meteorologists. Previous analyses have had to rely on sparse (and often inadequate) data from the conventional upper air observing network for diagnostic studies. The results, while useful, have left open many questions. In this study, the principal investigator will employ state-of-the-art mesoscale numerical models to analyze the three-dimensional structure of several simulated cyclone events. The models provide high temporal and spatial resolution which will allow a much more comprehensive view of the cyclone evolution. The principal investigator intends to look at the evolution of cyclones over both the ocean and the continent.