Dynamical Interpretation of Conceptual Models of Frontal Structure and Circulations

内锋演变和结构的概念模型 大气层外扰动的弯曲流动特性， 在数量和质量的复杂性增长，由于许多 各种气象条件下锋面气旋的个例研究 环境.凯瑟将把这些模型放入一个正式的， 定量动态语境这将通过以下途径来实现： 垂直环流的诊断，会聚和发散 风场和位涡场 分析了观测到的中尺度场，并在短期数值 使用中尺度数值模式进行预报。特色鲜明 诊断的字段将与 概念模型，以及那些由理想化的动态预测 理论特别是美国中部的锋面系统 成为研究的对象，以利用风暴- 前线实验系统测试（STORFEST）将在 1992年2月和3月。

Conceptual models of frontal evolution and structure within the curved flow charactestic of extratropical disturbances have grown in number and qualitative complexity, as a result of numerous case-studies of frontal cyclones in a variety of meteorological environments. Keyser will place these models into a formalized, quantitative dynamic context. This will be approached through diagnoses of the vertical circulations, converging and diverging wind patterns, and potential vorticity fields in objectively analyzed observed mesoscale fields, and in short-term numerical forecasts using mesoscale numerical models. Distinctive features of the diagnosed fields will be compared to those implicit in the conceptual models, and to those predicted by idealized dynamical theories. In particular, frontal systems in the central U.S. will be the object of study in order to take advantage of the STORM- Fronts Experiment Systems Test (STORMFEST) to take place in February and March 1992.