Aerosol Microphysics and Chemistry: Simulation of Impacts on the Atmospheric Composition and Climate

该项目将构建、测试和应用全球对流层气溶胶微物理、化学和运输的综合模型。该模型将包括空气中颗粒的形成、大小演变、组成、分散和去除，从而确定它们的分布、光学、物理和化学效应。研究内容包括三个方面：(1)建立多组分气溶胶系统的微物理光学模型，并计算波长相关的光学深度；(2)将光化学与气溶胶微物理相结合，包括气相和凝聚相之间的物质通量；(3)气溶胶/化学模型与三维示踪剂输运代码的耦合。该气溶胶模型将用于研究在遥远的海洋大气中形成的新的硫酸盐气溶胶颗粒。模式预测将与南半球海洋气溶胶表征实验（ACE-1）期间的超细颗粒测量结果进行比较。经验证的气溶胶模式将用作预测大气粒子对气候的化学和气候影响的工具。

9618425 Turco The project will construct, test, and apply a comprehensive model of global tropospheric aerosol microphysics, chemistry, and transport. The model will include the formation, size evolution, composition, dispersion and removal of airborne particles and thus determine their distribution, optical, physical, and chemical effects. The research contains three tasks: (1) construction of a microphysics and optics model which treats a multi-component aerosol system and calculates wavelength-dependent optical depths; (2) integration of photochemistry with aerosol microphysics, including material fluxes between vapor and condensed phase; and (3) coupling of aerosol/chemistry model to a 3-D tracer transport code. The aerosol model will be applied to an investigation of new sulfate aerosol particles that are formed in the remote marine atmosphere. The model predictions will be compared with measurements of ultrafine particles during the Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1). The validated and aerosol model will be used as a tool for predicting the chemical and climatic impacts of atmospheric particles on climate.