气候变化领域集成服务门户(CCPortal): New particle formation and its CCN enhancement in the Yangtze River Delta under the control of continental and marine air masses

CCPortal

DOI	10.1016/j.atmosenv.2021.118400
	New particle formation and its CCN enhancement in the Yangtze River Delta under the control of continental and marine air masses
	Fang X.; Hu M.; Shang D.; Tan T.; Zhao G.; Zong T.; Tang L.; Ma X.; Yang X.; Dong H.; Yu X.; Chen S.; Li X.; Liu Y.; Wang H.; Gao Y.; Lou S.; Zhao C.; Zeng L.; Lu K.; Zhang Y.; Wu Z.; Guo S.
发表日期	2021
ISSN	1352-2310
卷号	254
英文摘要	The aim of this investigation was to figure out the impacts of air mass origins on new particle formation (NPF) events and their cloud condensation nuclei (CCN) enhancement in a polluted atmosphere of the Yangtze River Delta (YRD). We measured the NPF gaseous precursors, 1 nm to 10 μm particle number size distribution, and particle hygroscopicity during a 1-month intensive field campaign in summer at a suburban site. We observed nine NPF events during the campaign, and found that sulfuric acid (H2SO4) played a key role in particle nucleation and subsequent growth. Air masses during the NPF events can be classified into continental (CT), continental-marine (CT-MR) and marine (MR) types, based on their backward trajectories. In CT air masses, the average concentrations of H2SO4 ((5.4 ± 1.0) × 107 cm−3) was 1 times higher than that in CT-MR ((3.2 ± 0.8) × 107 cm−3) and MR air masses ((2.8 ± 0.9) × 107 cm−3). Therefore, new particles in CT air masses were formed (nucleation rate J1.5, 157.4 ± 19.1 cm−3 s−1) and grew rapidly (growth rate GR3–25, 8.1 ± 6.9 nm h−1), which enhanced the number concentrations of 50–100 nm particles by a factor of 2–3. Additionally, the average hygroscopicity parameter of NPs in CT air masses (0.26 ± 0.02) was higher than that in CT-MR (0.13 ± 0.01) and MR (0.15) air masses, leading to a lower critical dry diameter for CCN activation. As a result, the CCN population enhancement due to NPF in continental air masses were 2–5 times higher than that in marine air masses at the suburban site of the YRD. © 2021 Elsevier Ltd
关键词	Air mass Cloud condensation nuclei New particle formation Sulfuric acid Yangtze River Delta
语种	英语
scopus关键词	Growth rate; Nucleation; River pollution; Rivers; Sulfuric acid; Air mass; Air mass origin; Cloud condensation nuclei; Continental air mass; Gaseous precursors; Marine air; New particle formation; Particle number size distribution; Suburban sites; Yangtze river delta; Condensation; monoterpene; aerosol formation; air mass; atmospheric pollution; cloud condensation nucleus; hygroscopicity; marine pollution; pollution control; size distribution; air; air pollution; Article; circadian rhythm; cloud condensation nuclei; environmental parameters; priority journal; river; suburban area; summer; temperature; time series analysis; urban area; wettability; China; Yangtze Basin
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248432
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education (IJRC), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China; State Environmental Protection Key Laboratory of Formation of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai, 200233, China
推荐引用方式 GB/T 7714	Fang X.,Hu M.,Shang D.,et al. New particle formation and its CCN enhancement in the Yangtze River Delta under the control of continental and marine air masses[J],2021,254.
APA	Fang X..,Hu M..,Shang D..,Tan T..,Zhao G..,...&Guo S..(2021).New particle formation and its CCN enhancement in the Yangtze River Delta under the control of continental and marine air masses.ATMOSPHERIC ENVIRONMENT,254.
MLA	Fang X.,et al."New particle formation and its CCN enhancement in the Yangtze River Delta under the control of continental and marine air masses".ATMOSPHERIC ENVIRONMENT 254(2021).