Development of Parameterizations of the Effects of Heterogeneous Cloud Chemistry on the Radiative and Water Activity Properties of Aerosols in Mesoscale Models

小行星9526402 大气气溶胶粒子被认为可以通过散射和吸收入射的太阳辐射直接影响地球的辐射平衡，或者通过改变云的微物理性质间接影响地球的辐射平衡。 该项目解决了非均匀硫酸盐化学对云滴数浓度和粒径分布的影响（气溶胶间接效应）。 这项研究使用计算机模拟开发的云非均匀化学的光学和水的活性特性的云处理硫酸盐气溶胶的影响的参数化。 参数化利用传递函数，以允许估计的影响，从一系列的预测变量的组件的标准，批量paramerized云模型。区域尺度模拟方法是一种评价云非均匀化学对云凝结核（CCN）和光学特性影响的新方法，目前还不能用现有的全球气候模式（GCM）进行改进。 该项目的结果将提供所需的改进，在目前的能力的模型，在区域尺度上产生云/气溶胶相互作用的现实的治疗。 这种参数化研究将是一个关键的，基本的步骤，在发展类似的参数化的GCM的。

9526402 Hegg Atmospheric aerosol particles are believed to influence the earth's radiation balance either directly by scattering and absorbing incoming solar radiation, or indirectly by altering cloud microphysical properties. This project addresses the effects of heterogeneous sulfate chemistry on cloud droplet number concentrations and size distributions (the aerosol indirect effect). The study uses computer modeling to develop a parameterization of the impact of cloud heterogeneous chemistry on the optical and water active properties of cloud-processed sulfate aerosols. The parameterization utilizes a transfer function to allow estimation of the impact from an array of prognostic variables that are components of standard, bulk-paramerized cloud models. The regional scale modeling approach is a new method for evaluating the influence of cloud heterogeneous chemistry on cloud condensation nuclei (CCN) and optical properties, a refinement not currently possible with existing global climate models (GCMs). The results from the project will provide needed improvements in the current ability of models in generating realistic treatments of cloud/aerosol interactions on a regional scale. This parameterization study will be a key, fundamental step in developing similar parameterizations for GCM's.