Effects of Clouds on Aerosol Production and Distribution

[305684]这项研究的目的是提高对云和云过程在局地和全球尺度上对气溶胶输送和转变的重要性的认识。将采用二维欧拉云域模式研究深层对流对对流层气溶胶分布和产生的影响，并特别关注对流层上层。气相和云相化学的描述将与混合相准显式微物理相结合。这种新的气溶胶形成和演化模型将用于研究化学和运输对气溶胶数量和大小浓度的影响。根据这项初步工作，将开发用于NCAR社区气候模式（CCM2）的参数化。然后将气候模式运行得到的气溶胶光学深度与现有的卫星测量值进行比较，以了解云在这一特性的季节和纬度变化中的作用。这项工作将有助于提高对云效应强度的认识，并有助于预测由于气溶胶分布、人为排放或云的类型和数量的变化而可能发生的全球影响。

9305684 Kreidenweis This study is aimed at development of an improved understanding of the importance of clouds and cloud processes upon aerosol transport and transformations on both the local and global scales. A two-dimensional Eulerian cloud domain model study of the impact of deep convection on tropospheric aerosol distribution and production, with particular attention to the upper troposphere, will be performed. Descriptions of gas- and cloud-phase chemistry will be coupled with mixed-phased quasi-explicit microphysics. This new model of aerosol formation and evolution will be employed to study the effects of chemistry and transport upon aerosol number and size concentrations. From this initial work, a parameterization for use with the NCAR Community Climate Model (CCM2) will be developed. Aerosol optical depths from the climate model runs will then be compared with available satellite measurements, with a particular view toward understanding the role of clouds in seasonal and latitudinal variations on this property. This work will lead to improved understanding of the magnitudes of cloud effects, and will assist in the prediction of global effects that may occur due to changes in aerosol distributions, anthropogenic emissions or in cloud type and amounts.