【摘要】 大气中二次有机气溶胶(SOA)是PM2.5中的重要组成部分,挥发性有机物(VOCs)的光化学氧化是其主要来源之一.从VOCs转化生成SOA的过程非常复杂,参数化方法是一种相对简化的估算方式,可以用于区分不同VOCs物种对SOA生成的贡献.本文介绍了基于二产物和基于挥发性分级两种常用的参数化估算方法,并总结分析文献报道的SOA估算结果.文章中也指出现在的参数化估算还存在一些问题,如何准确量化VOCs向SOA的转化过程将是大气化学未来的重要研究工作.更多还原

【Abstract】 Secondary organic aerosol(SOA) is a very important portion in mass concentration of ambient fine particles(PM2.5),and the volatile organic compounds(VOCs) are one of the most important precursors for SOA formation.Considering the complexity of the processes from the VOCs conversion to SOA production,the parameterization is a practical approach in estimating SOA formation potential,and hence in identifying the relative contributions of various VOC species to fine particles.Two estimation methods were introduced in this study,namely 2-products method and the volatility basis-set method,and the estimation results from recent literatures were compared.This work also discussed the existing problems in current parameterization methods.More attentions and detailed investigations should be paid in accurate quantification of VOC-to-SOA transformation in future atmospheric chemistry studies.更多还原