Heterogeneous Atmospheric Chemistry: Modeling Tropospheric Processes and Effects

92166646 Turco这一研究项目将继续建立对流层非均质化学过程和影响的综合模拟能力。将开发一系列模型来系统地研究发生在气溶胶和云颗粒上的化学现象。这些模型将处理气粒的基本物理和化学过程。这些模型将处理气体-颗粒相互作用的基本物理和化学过程，这些过程将使用实验室和现场数据进行校准。异质物理和化学模式将与模拟大气动力学(和辐射传输)的模式相耦合，使其能够应用于包括海洋边界层中硫酸盐气溶胶的演变、卷云中冰上发生的化学作用、卷云中冰上发生的大气化学作用的关系以及大气化学作用与云辐射效应的关系等问题。这些模式在几个方面将是独一无二的。它们将基于基本过程--例如成核和表面吸附--以实现比目前使用的更现实的异质过程的机械处理。这些模型将更定量地定义耦合的物理和化学过程，并将被设计为集成到全面的对流层化学模拟中。这项研究计划强调大气化学和气候方面的模型开发和学生培训。

92166646 Turco This research project will continue the establishment of a comprehensive modeling capability for tropospheric heterogenous chemical processes and effects. A hierarchy of models will be developed to study systematically the chemical phenomena occurring on aerosol and cloud particles. The models will treat the basic physical and chemical processes of gas-particles. The models will treat the basic physical and chemical processes of gas-particle interactions, which will be calibrated using laboratory and field data. The heterogenous physics and chemistry models will be coupled to models that simulate atmospheric dynamics (and radiative transfer), allowing applications to problems including the evolution of sulfate aerosols in the marine boundary layer, the chemistry that occurs on ice in cirrus clouds, and the relationship of atmospheric chemistry that occurs on ice in cirrus clouds, and the relationship of atmospheric chemistry to cloud radiative effects. These models will be unique in several respects. They will be based on fundamental processes -- for example, nucleation and surface adsorption -- to achieve more realistic mechanistic treatments of heterogenous processes than are presently used. The models will be more quantitative in defining coupled physical and chemical processes, and will be designed for integration into comprehensive tropospheric chemistry simulations. This research program emphasizes model development and student training in atmospheric chemistry and climate.