Development, Validation, and Application of Multicomponent Atmospheric New Particle Formation Schemes

这个项目的重点是研究大气中非常小的新粒子的成核或形成。该方法依赖于复杂的计算，包括大气团簇的结构和热化学性质。建模结果将与可用的测量结果进行比较。该项目将产生可纳入区域和全球模式的成核方案，以减少在评估大气气溶胶的气候和环境影响方面的不确定性。这项工作的目的是开发新的方案多组分成核在大气中涉及硫酸，水，氨，甲胺和有机物。该项目包括4个任务：(1)中性和带电三元簇的量子化学研究；(2)新成核模型的发展；(3)新的大气成核方案的应用与评价；(4)评估三元成核过程对气候的影响。新的成核方案对气溶胶间接辐射强迫的影响将使用GEOS-Chem模式进行评估。

This project is focused on investigating the nucleation or formation of very small new particles in the atmosphere. The method relies on complex calculations involving the structural and thermochemical properties of atmospheric clusters. Modeling results will be compared with measurements where they are available. The project will result in nucleation schemes that can be incorporated into regional and global models to reduce uncertainties in the assessment of the climatic and environmental impacts of atmospheric aerosols. The objective of this effort is to develop new schemes of multicomponent nucleation in the atmosphere involving sulfuric acid, water, ammonia, methylamines, and organics. The project consists of 4 tasks: (1) Quantum chemistry studies of neutral and charged ternary clusters; (2) Development of new nucleation models; (3) Application and evaluation of new nucleation schemes in the atmosphere; and (4) Assessing the climate implications of ternary nucleation processes. The implications of the new nucleation schemes on the aerosol indirect radiative forcing will be evaluated using the GEOS-Chem model.