气候变化领域集成服务门户(CCPortal): Reduced volatility of aerosols from surface emissions to the top of the planetary boundary layer

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DOI	10.5194/acp-21-14749-2021
	Reduced volatility of aerosols from surface emissions to the top of the planetary boundary layer
	Liu Q.; Liu D.; Wu Y.; Bi K.; Gao W.; Tian P.; Zhao D.; Li S.; Yu C.; Tang G.; Wu Y.; Hu K.; Ding S.; Gao Q.; Wang F.; Kong S.; He H.; Huang M.; Ding D.
发表日期	2021
ISSN	1680-7316
起始页码	14749
结束页码	14760
卷号	21 期号:19
英文摘要	Aerosols from surface emission can be transported upwards through convective mixing in the planetary boundary layer (PBL), which subsequently interact with clouds, serving as important sources to nucleate droplets or ice particles. However, the evolution of aerosol composition during this vertical transport has yet to be explicitly understood. In this study, simultaneous measurements of detailed aerosol compositions were conducted at two sites, namely urban Beijing (50ĝ€¯m above sea level-a.s.l.) and Haituo mountain (1344ĝ€¯mĝ€¯a.s.l.) during wintertime, representing the anthropogenically polluted surface environment and the top of the PBL, respectively. The pollutants from surface emissions were observed to reach the mountain site on daily basis through daytime PBL convective mixing. From the surface to the top of PBL, we found efficient transport or formation of lower-volatility species (black carbon, sulfate, and low-volatile organic aerosol, OA); however, a notable reduction in semivolatile substances, such as the fractions of nitrate and semivolatile OA reduced by 74ĝ€¯% and 76ĝ€¯%, respectively, during the upward transport. This implies that the mass loss of these semivolatile species was driven by the evaporation process, which repartitioned the condensed semivolatile substances to the gas phase when aerosols were transported and exposed to a cleaner environment. In combination with the oxidation processes, these led to an enhanced oxidation state of OA at the top of the PBL compared to surface environment, with an increase of oxygen to carbon atomic ratio by 0.2. Such a reduction in aerosol volatility during vertical transport may be important in modifying its viscosity, nucleation activity, and atmospheric lifetime. © Copyright:
语种	英语
scopus关键词	aerosol; aerosol composition; concentration (composition); convective boundary layer; source apportionment; urban area; Beijing [Beijing (ADS)]; 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/246533
作者单位	State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou, 310027, China; Beijing Weather Modification Office, Beijing, 100089, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Centre for Atmospheric Sciences, School of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, United Kingdom; Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; Field Experiment Base of Cloud and Precipitation Research in North China, China Meteorolo...
推荐引用方式 GB/T 7714	Liu Q.,Liu D.,Wu Y.,et al. Reduced volatility of aerosols from surface emissions to the top of the planetary boundary layer[J],2021,21(19).
APA	Liu Q..,Liu D..,Wu Y..,Bi K..,Gao W..,...&Ding D..(2021).Reduced volatility of aerosols from surface emissions to the top of the planetary boundary layer.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Liu Q.,et al."Reduced volatility of aerosols from surface emissions to the top of the planetary boundary layer".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).