Modeling and Analysis of Heterogeneous Chemical Processes in the Atmosphere: The Ozone Hole and Tropospheric Chemistry

模型的构建和使用有助于理解真实事物。大气的计算机模型有助于理解各种过程及其相互作用。此外，模型的结果可以确定特别重要的参数，并建议进行实验室和现场实验，以澄清不确定性。随着计算能力的提高，可以构建更复杂的模型。模型通常从详细的盒子模型发展到一维(与海拔高度相关)、二维(海拔和纬度)和三维(海拔、纬度和经度)模型，在这些模型中，为了扩大空间覆盖范围而牺牲了物理和化学细节，但高维模型旨在捕获低维模型的基本特征。大多数大气化学模型都局限于气相化学。他们忽略了云层和气溶胶粒子的作用。该项目将开发大气化学的数值模式，将这些多媒体系统包括在内。南极臭氧层空洞的发现突显了这些过程的重要性，该空洞的形成部分是由于极地平流层云的存在。长期目标是开发一个三维光化学模式，其中包括云/气溶胶化学模式中最有用的特征。

The construction and use of models aid the understanding of the real thing. Computer models of the atmosphere lead to an understanding of various processes and their interactions. Furthermore, the results of models can identify parameters that are particularly important and suggest laboratory and field experiments that may clarify uncertainties. As computing capabilities improve, more complex models can be constructed. Models generally grow from detailed box models to one- dimensional (altitude dependence), two-dimensional (altitude and latitude), and three-dimensional (altitude, latitude, and longitude) models in which physical and chemical detail is sacrificed for expanded spatial coverage, but the higher dimensional models are designed to capture the essential features of the lower dimensional models. Most models of atmospheric chemistry have been limited to gas phase chemistry. They ignore the role of clouds and aerosol particles. This project will develop numerical models of atmospheric chemistry to include these multimedia systems. The importance of these processes has been highlighted by the discovery of the Antarctic ozone hole which develops, in part, because of the presence of polar stratospheric clouds. The long-range objective is to develop a three-dimensional photochemical model that includes the most useful features of the cloud/aerosol chemical models.