Observation of aerosol size distribution and new particle formation at a coastal city in the Yangtze River Delta, China

Wang, Honglei; Lu, Shenggao; Li, Li; Yuan, Jing; Zhang, Xiaohan; Tian, Xudong; Tang, Qian

doi:10.1016/j.scitotenv.2016.05.164

Cited by 26 publications

(13 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly to our study, daylight NPF events were also observed frequently (40 % of all observations) in urban locations in Beijing, China, during periods of low relative humidity and peak solar radiation, with the average GRs of 1.8 and 4.4 nm h −1 during clean and polluted NPF events, respectively (Wu et al, 2007). In a recent study in the North China Plain, Shen et al (2016) found daylight NPF event average GRs of 1.2 nm h −1 higher than in this study. A 10-day campaign in a Japanese forest showed midday NPFs with the mean particle GR of 9.2 nm h −1 , ranged between 5 and 15.7 nm h −1 , which is approximately four times higher than in our study (Han et al, 2013).…”

Section: Back Trajectory Analysissupporting

confidence: 87%

Nocturnal new particle formation events in urban environments

et al. 2017

View full text Add to dashboard Cite

Abstract. Few studies have investigated nocturnal new particle formation (NPF) events, and none of them were conducted in urban environments. Nocturnal NPF can potentially be a significant source of particles in urban areas, and studying them would improve our understanding of nucleation mechanisms. To address this, our study was conducted in an urban environment to investigate the physical characteristics of NPF events, with a particular focus on nocturnal events and the differences between them and the daytime NPF events. Particle number size distribution (PNSD) was measured for 2 weeks at each of 25 sites across an urban environment. A new method was proposed to automatically categorise NPF events based on growth rate (GR) in order to remove the bias related to the manual procedure. Out of 219 observed events, 118 and 101 were categorised into class I and II respectively and 73 happened during the nighttime which included more than 30 % of the events. GR and condensation sink (CS) were calculated and a slight negative relationship between GR and CS was observed. Nocturnal events displayed higher GRs compared to daylight ones which were on average about 10 %. Back trajectory analysis was also conducted to estimate the locations of the sources of daylight and nocturnal precursors. While the precursors related to daylight events originated from different locations with no particular pattern, back-trajectory analysis showed many air masses associated with nocturnal NPF events were transported from over the ocean. Overall, nocturnal NPF events were found to be a significant source of particles in the studied environment with different physical characteristics and/or sources compared to daylight events.

show abstract

Section: Back Trajectory Analysissupporting

confidence: 87%

Nocturnal new particle formation events in urban environments

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Besides routine observations, comprehensive campaigns like PRIDE-PRD2004, CAREBeijing-2006, and CAREBeijing-2008 were also carried out for a better understanding of NPF and aerosol pollution in representative regions and periods in China. Long-term observations of NPF are relatively rare in China, and only a few studies reported NPF observations covering more than a 1-year period Kivekäs et al, 2009;Yao et al, 2010;Shen et al, 2011;Qi et al, 2015;Peng et al, 2017). The relative short-period observations may not represent varying atmospheric conditions, and therefore, the applicability of these observation results may be limited to specific conditions.…”

Section: Overview Of Npf Research In Chinamentioning

confidence: 99%

“…In northern China, spring is usually the season with the highest frequency of NPF events, which is probably due to the typically low CS, relatively high solar radiation intensity, and low temperature and RH (Shen et al, 2011;Wu et al, 2007). In the NCP of China, many studies observed that summer had the lowest NPF event frequency, although the condensable vapour concentration was the highest during summer months due to the enhanced photochemical process (Shen et al, 2011;Wu et al, 2007;Yue et al, 2009). The lowest frequency of NPF events during summertime in the NCP might be related to the high temperatures and RH, together with the stagnant and polluted air masses, which could cause a high CS (Wu et al, 2007).…”

Section: Npf Frequencymentioning

confidence: 99%

Atmospheric new particle formation in China

et al. 2019

View full text Add to dashboard Cite

Abstract. New particle formation (NPF) studies in China were summarized comprehensively in this paper. NPF frequency, formation rate, and particle growth rate were closely compared among the observations carried out at different types of sites in different regions of China in different seasons, with the aim of exploring the nucleation and particle growth mechanisms. The interactions between air pollution and NPF are discussed, emphasizing the properties of NPF under heavy pollution conditions. The current understanding of NPF cannot fully explain the frequent occurrence of NPF at high aerosol loadings in China, and possible reasons for this phenomenon are proposed. The effects of NPF and some aspects of NPF research requiring further investigation are also summarized in this paper.

show abstract

“…The NPF leads directly to a burst of small nanoparticles and increases the particle number concentration prominently. While NPF usually tends to occur in clean days with low CS, particle number concentrations are usually much higher on NPF event days than on non-event days (Shen et al, 2016a;An et al, 2015). Kulmala et al (2016a) studied separately nucleation, Aitken and accumulation mode particle 5 number concentrations in Nanjing in YRD regions of China, and estimated that the majority of the particles were of secondary origin in all the modes.…”

Section: Significance and Future Research Directions For Npf Studymentioning

confidence: 99%

“…Kulmala et al (2016a) studied separately nucleation, Aitken and accumulation mode particle 5 number concentrations in Nanjing in YRD regions of China, and estimated that the majority of the particles were of secondary origin in all the modes. NPF was found to be an important influential factor on atmospheric aerosol number size distribution from remote mountains to polluted cities (Du et al, 2012;Shen et al, 2016a;Zhang et al, 2017c). NPF also changes the surface and volume size distribution.…”

Section: Significance and Future Research Directions For Npf Studymentioning

confidence: 99%

Atmospheric new particle formation in China

Chu¹,

Kerminen²,

Bianchi³

et al. 2018

Preprint

View full text Add to dashboard Cite

New particle formation (NPF) studies in China were summarized comprehensively in this paper. NPF frequency, formation rate and particle growth rate were closely compared among the observations carried out at different types of sites in different regions of China in different seasons, with the aim of exploring the nucleation and particle growth mechanisms. The interactions between air pollution and NPF are discussed, emphasizing on the properties of NPF under heavy pollution 10 conditions. The current understanding of NPF cannot not be fully explain the frequent occurrence of NPF at high aerosol loadings in China, and possible reasons for this phenomenon are proposed. The effects of NPF and some aspects of NPF research requiring further investigations are also summarized in this paper.

show abstract

Observation of aerosol size distribution and new particle formation at a coastal city in the Yangtze River Delta, China

Cited by 26 publications

References 57 publications

Nocturnal new particle formation events in urban environments

Nocturnal new particle formation events in urban environments

Atmospheric new particle formation in China

Atmospheric new particle formation in China

Contact Info

Product

Resources

About