Models-3 community multiscale air quality (CMAQ) model aerosol component - 1. Model description
Models-3 community multiscale air quality (CMAQ) model aerosol component - 1. Model description
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DOI：
10.1029/2001jd001409
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发表时间：
2003-03-26
影响因子：
4.4
通讯作者：
Roselle, SJ
中科院分区：
文献类型：
--
作者：
Binkowski, FS;Roselle, SJ
社区多尺度空气质量(CMAQ)模式中的气溶胶成分被设计成一种有效和经济地描述大气中气溶胶动力学的方法。所采用的方法将颗粒大小分布表示为三个对数正态分布的叠加，称为模式。包括凝聚、通过增加质量而生长的颗粒和形成新颗粒的过程。时间步长是用解析解的微分方程守恒的数字，表面积，和物种质量。该组成部分同时考虑了PM2.5和PM10，并包括元素碳和有机碳、粉尘和其他未进一步规定的物种的主要排放量的估计数。被考虑的次生物种是硫酸盐、硝酸盐、铵、水和来自人为和生物起源的前体的次生有机物。气溶胶对可见光的消光有两种方法：一种是Mie消光的参数近似方法，另一种是基于现场数据的经验方法。文中还描述了模拟云与气溶胶相互作用的算法。给出了箱形模型和三维模拟的结果。
The aerosol component of the Community Multiscale Air Quality (CMAQ) model is designed to be an efficient and economical depiction of aerosol dynamics in the atmosphere. The approach taken represents the particle size distribution as the superposition of three lognormal subdistributions, called modes. The processes of coagulation, particle growth by the addition of mass, and new particle formation, are included. Time stepping is done with analytical solutions to the differential equations for the conservation of number, surface area, and species mass. The component considers both PM2.5 and PM10 and includes estimates of the primary emissions of elemental and organic carbon, dust, and other species not further specified. Secondary species considered are sulfate, nitrate, ammonium, water, and secondary organics from precursors of anthropogenic and biogenic origin. Extinction of visible light by aerosols is represented by two methods: a parametric approximation to Mie extinction and an empirical approach based upon field data. The algorithms that simulate cloud interactions with aerosols are also described. Results from box model and three-dimensional simulations are exhibited.