Instability of Frontal Waves and Upper Level Frontogenesis

Mechoso博士和Arakawa博士将继续他们的两个初选 前沿研究的推进。 首先，他们正在调查 导致锋面形成和生成的过程 锋面上不稳定的次级波，特别是在中部， 对流层上部 其次，他们正在开发新的数字 适用于研究锋面现象的方法。 以前的工作 调查人员现在的具体考虑是， 几个主题：（1）比较优势和劣势 使用相对压力（.）作为垂直 坐标系和使用位温（>）的坐标系;（2） 锋面小尺度扰动的起源和演化;（3） 非绝热过程在锋生中的作用;（4）非绝热过程在锋生中的作用 建立具有垂直坐标的连续方程模式 逐渐改变。从地面到上层。 根据他们以前的拨款，主要研究人员 发展大规模杀伤性武器的工作取得了重大进展， 能够解决锋生过程的比例模型。 他们 还成功地解决了一些基本问题 关于这些过程。 他们的研究最终将有助于 改进业务天气预报模式。

Drs. Mechoso and Arakawa will continue their two primary research thrusts on fronts. First, they are investigating processes which lead to frontal formation and the generation of unstable secondary waves on fronts, particularly in the middle and upper troposphere. Second, they are developing new numerical methods suitable for the study of frontal phenomena. Previous work by the investigators now leads to the specific consideration of several topics: (1) the comparative advantages and disadvantages of models which use relative pressure (.) as the vertical coordinate and those which use potential temperature (>); (2) the origin and evolution of small-scale disturbances on fronts; (3) the role of diabatic processes in frontogenesis; and (4) the development of primitive-equation models with a vertical coordinate that gradually changes from . at the surface to > at upper levels. Under their previous grant, the principal investigators made considerable progress in their work on the development of large scale models capable of resolving frontogenetic processes. They have also succeeded in addressing some of the fundamental questions about these processes. Their research ultimately will contribute to the improvement of operational weather forecast models.