Characteristics of aerosol size distribution and liquid water content under ambient RH conditions in Beijing

doi:10.1016/j.atmosenv.2022.119397

	Characteristics of aerosol size distribution and liquid water content under ambient RH conditions in Beijing
	Dai, Haosheng 1,6; Zhang, Jiaoshi 4,6,7; Gui, Huaqiao 6,8; Shen, Lin 1,6; Wei, Xiuli 6,8; Xie, Zhibo 6; Chen, Shiyi 2; Wu, Zhijun 2; Chen, Da-Ren 3; Liu, Jianguo 5,6,8
刊名	ATMOSPHERIC ENVIRONMENT
	2022-12-15
卷号	291
关键词	Aerosol liquid water content Particle number size distribution Relative humidity Hygroscopic growth
ISSN号	1352-2310
DOI	10.1016/j.atmosenv.2022.119397
通讯作者	Zhang, Jiaoshi(jszhang@aiofm.ac.cn) ; Liu, Jianguo(jgliu@aiofm.ac.cn)
英文摘要	The variation of ambient relative humidity (RH) affects the water uptake of aerosols in the atmosphere, thereby altering the aerosol size distribution and mass concentration. In this study, aerosol size distributions under both dry and ambient RH conditions are measured using an active RH-controlled dry-ambient aerosol size spectrometer (DAASS) at an urban site in Beijing during the springtime of 2021, and the aerosol liquid water content (ALWC) is derived accordingly. During the measurement period, a sharp increase of the ALWC was commonly observed when ambient RHs reached above 50%, demonstrating a potential phase change of the aerosol which further increases the rate of water uptake. Considerably high ALWC events were observed during the nighttime, with further elevated ambient RH above 60%. The liquid water accounts for up to 42.5% of the total aerosol volume, corresponding to a maximum ALWC of 8.79 mu g m(-3) . The evolution of geometric mean diameter of accumulation mode particles agrees well with the enhancement of the ALWC (R-2 of 0.73), revealing a significant growth of accumulation mode particles resulting from water uptake. Besides, by investigating the RH-dependent ambient aerosol surface area concentration, it is found that the aerosol surface area concentration can be underestimated by similar to 20% under dry conditions when the ambient RH elevates to above 70%.
资助项目	National Nature Science Foun-dation of China ; National Key R&D Program of China ; Science and Technological Fund of Anhui Province ; [41905028] ; [2017YFC0209504] ; [1908085MD114]
WOS关键词	PARTICLE FORMATION ; URBAN ATMOSPHERE ; CHINA ; GROWTH ; SHRINKAGE ; EPISODES ; STATE
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000869099500004
资助机构	National Nature Science Foun-dation of China ; National Key R&D Program of China ; Science and Technological Fund of Anhui Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129935]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Jiaoshi; Liu, Jianguo
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100871, Peoples R China 3.Virginia Commonwealth Univ, Dept Mech & Nucl Engn, Particle Lab, Richmond, VA 23284 USA 4.Washington Univ St Louis, Ctr Aerosol Sci & Engn, St Louis, MO 63130 USA 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 7.Washington Univ St Louis, Ctr Aerosol Sci & Engn, St Louis, MO USA 8.Chinese Acad Sci, Inst Urban Environm, CAS Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Dai, Haosheng,Zhang, Jiaoshi,Gui, Huaqiao,et al. Characteristics of aerosol size distribution and liquid water content under ambient RH conditions in Beijing[J]. ATMOSPHERIC ENVIRONMENT,2022,291.
APA	Dai, Haosheng.,Zhang, Jiaoshi.,Gui, Huaqiao.,Shen, Lin.,Wei, Xiuli.,...&Liu, Jianguo.(2022).Characteristics of aerosol size distribution and liquid water content under ambient RH conditions in Beijing.ATMOSPHERIC ENVIRONMENT,291.
MLA	Dai, Haosheng,et al."Characteristics of aerosol size distribution and liquid water content under ambient RH conditions in Beijing".ATMOSPHERIC ENVIRONMENT 291(2022).