Numerical Modeling of the Atmosphere

该奖项提供了广泛的支持， 一项旨在改进数字模型的研究计划 对流层和平流层环流。 长期 好处将是我们预测未来的能力 天气和气候。 该项目包括三个主要 推力 第一个问题涉及到各种问题， 大气建模的动力学和计算方面， 重点是开发、应用和 等熵坐标模型的评价。 使用 等熵坐标系允许人们克服某些 与其他坐标系相关的计算问题 这可能会影响表示的准确性 模型中的动态过程。 另一个令人兴奋的部分 本练习是混合坐标模型的构建 它结合了等熵模型和可变深度 行星边界层模式 第二个主要领域涉及以下参数化： 亚网格尺度过程，涉及（1）地形学，和（2） 水分，重点是三种方式之间的相互作用 对流尺度、中尺度和大尺度环流 各种类型的流动模式和表面边界条件。 这将作为以下统计研究的组合进行： 观察条件和数值模拟。 最后，主要研究人员将纳入一个 新参数化的数量到UCLA一般 循环模型

This award provides continuing support for a broad research program aimed at improving numerical models of tropospheric and stratospheric circulations. The long-term benefit will be the improvement in our ability to predict weather and climate. The project consists of three major thrusts. The first involves a variety of problems related to dynamical and computational aspects of atmospheric modeling, with the focus being the development, application, and evaluation of an isentropic coordinate model. Using an isentropic coordinate system allows one to overcome certain computational problems associated with other coordinate systems which can affect the accuracy of the representation of dynamical processes in the model. Another exciting part of this activity is the construction of a hybrid-coordinate model that combines the isentropic model with a variable depth planetary boundary layer model. The second major area involves the parameterization of subgrid-scale processes involving (1) orography, and (2) moisture, with emphasis on the three-way interactions between convective-scale, mesoscale and large-scale circulations under various types of flow patterns and surface boundary conditions. This will be done as a combination of statistical studies of observed conditions and numerical simulations. Finally, the principal investigators will incorporate a number of the new parameterizations into the UCLA general circulation model.