气候变化领域集成服务门户(CCPortal): Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing

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DOI	10.5194/acp-21-5499-2021
	Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing
	Guo Y.; Yan C.; Li C.; Ma W.; Feng Z.; Zhou Y.; Lin Z.; Dada L.; Stolzenburg D.; Yin R.; Kontkanen J.; Daellenbach K.R.; Kangasluoma J.; Yao L.; Chu B.; Wang Y.; Cai R.; Bianchi F.; Liu Y.; Kulmala M.
发表日期	2021
ISSN	1680-7316
起始页码	5499
结束页码	5511
卷号	21 期号:7
英文摘要	Gaseous sulfuric acid (SA) has received a lot of attention for its crucial role in atmospheric new particle formation (NPF). And for this reason, studies until now have mainly focused on daytime SA when most NPF events occur. While daytime SA production is driven by SO2 oxidation of OH radicals of photochemical origin, the formation of SA during nighttime and its potential influence on particle formation remains poorly understood. Here we present evidence for significant nighttime SA production in urban Beijing during winter, yielding concentrations between 1.0 and 3.0-106 cm-3. We found a high frequency (30 %) of nighttime SA events, which are defined by the appearance of a distinct SA peak observed between 20:00 and 04:00 local time, with the maximum concentration exceeding 1.0-106 cm-3. These events mostly occurred during unpolluted nights with a low vapor condensation sink. Furthermore, we found that under very clean conditions (visibility >16.0 km) with abundant ozone (concentration >2.0-1011 cm-3, 7 ppb), the overall sink of SA was strongly correlated with the products of O3, alkenes and SO2 concentrations, suggesting that the ozonolysis of alkenes played a major role in nighttime SA formation under such conditions. This is in light of previous studies showing that the ozonolysis of alkenes can form OH radicals and stabilized Criegee intermediates (SCIs), both of which are able to oxidize SO2 and thus lead to SA formation. However, we also need to point out that there exist additional sources of SA under more polluted conditions, which are not investigated in this study. Moreover, there was a strong correlation between SA concentration and the number concentration of sub-3 nm particles on both clean and polluted nights. Different from forest environments, where oxidized biogenic vapors are the main driver of nighttime clustering, our study demonstrates that the formation of nighttime cluster mode particles in urban environments is mainly driven by nighttime SA production. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol formation; alkene; concentration (composition); hydroxyl radical; oxidation; photochemistry; sulfuric acid; Beijing [China]; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246990
作者单位	Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland; State Key Joint Laboratory of Environment Simulation and Pollution Control, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, School of Environment, Tsinghua University, Beijing, China
推荐引用方式 GB/T 7714	Guo Y.,Yan C.,Li C.,et al. Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing[J],2021,21(7).
APA	Guo Y..,Yan C..,Li C..,Ma W..,Feng Z..,...&Kulmala M..(2021).Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7).
MLA	Guo Y.,et al."Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021).