气候变化领域集成服务门户(CCPortal): Effects of ozone and relative humidity in secondary inorganic aerosol formation during haze events in Beijing, China

CCPortal

DOI	10.1016/j.atmosres.2021.105855
	Effects of ozone and relative humidity in secondary inorganic aerosol formation during haze events in Beijing, China
	Ma P.; Quan J.; Jia X.; Liao Z.; Wang Q.; Cheng Z.; Dou Y.; Su J.; Pan Y.
发表日期	2021
ISSN	0169-8095
卷号	264
英文摘要	Secondary inorganic aerosols (SIAs) are major components of PM2.5 in haze events in Beijing, China. Gas-phase oxidation and aqueous heterogeneous reactions play vital roles in the SIAs formation. Here we analyzed the sensitivity of oxidation ratios of sulfur (SOR) and nitrogen (NOR) to relative humidity (RH) and ozone (O3), based on comprehensive observations from January 15 to March 6, 2019. The observations reveal that the SOR and NOR increased generally with both O3 and RH in haze events. Further mechanism analyses reveal striking differences between the sensitivity of the SOR to O3 and RH and that of the NOR. The SOR is sensitive to O3 when RH is lower than 40%, but converts to RH when RH is higher than 40%, while the NOR is sensitive to both O3 and RH in all regimes. In haze event, aqueous heterogeneous reactions are enhanced due to increasing RH while atmospheric oxidation capacity decreases. The observations show that the SOR increased significantly in haze event but the NOR kept at a relatively stable level. These results suggest that aqueous heterogeneous reactions plays more important roles in sulfate formation than in nitrate formation. © 2021 Elsevier B.V.
英文关键词	O3; RH; Secondary inorganic aerosol; SOR and NOR
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236570
作者单位	Institute of Urban Meteorology, Chinese Meteorological Administration (CMA), Beijing, China
推荐引用方式 GB/T 7714	Ma P.,Quan J.,Jia X.,et al. Effects of ozone and relative humidity in secondary inorganic aerosol formation during haze events in Beijing, China[J],2021,264.
APA	Ma P..,Quan J..,Jia X..,Liao Z..,Wang Q..,...&Pan Y..(2021).Effects of ozone and relative humidity in secondary inorganic aerosol formation during haze events in Beijing, China.Atmospheric Research,264.
MLA	Ma P.,et al."Effects of ozone and relative humidity in secondary inorganic aerosol formation during haze events in Beijing, China".Atmospheric Research 264(2021).