Model analysis of secondary organic aerosol over China with a regional air quality modeling system(RAMS-CMAQ)

被引:0
|
作者
LI Jia-Lin [1 ,2 ]
ZHANG Mei-Gen [1 ,3 ]
GAO Yi [1 ]
CHEN Lei [1 ,2 ]
机构
[1] State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC),Institute of Atmospheric Physics(IAP),Chinese Academy of Sciences(CAS)
[2] College of Earth Science,University of Chinese Academy of Sciences
[3] Center for Excellence in Urban Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences
关键词
有机气溶胶; 灰霾; 京津冀; 挥发性有机化合物;
D O I
暂无
中图分类号
X513 [粒状污染物];
学科分类号
摘要
为了研究我国二次有机气溶胶(SOA)时空分布及其主要组分,更新了RAMS-CMAQ的SOA模块,主要考虑SOA老化,不同NOx浓度下SOA的形成以及异戊二烯和倍半萜烯生成SOA的机制。结果表明,SOA在我国中东部地区浓度较高而在西部则较低。高SOA覆盖两块区域:京津冀到长江中游及四川盆地到我国西南边界,但对有机气溶胶(OA)的贡献不到10%,低SOA主要出现在青藏高原,占OA的20%–30%。值得注意的是,冬季人为源前体物对SOA的贡献显著,在中东部地区可达50%–80%。在北京,人为源SOA主要前体物是甲苯和二甲苯而单萜烯则是生物源SOA主要前体物。SOA的老化部分超过57%,这可能是SOA消光增强的原因。
引用
收藏
页码:443 / 450
页数:8
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