DOI: 10.1016/j.atmosenv.2014.08.001
Scopus记录号: 2-s2.0-84905438885
论文题名: Observations of new particle formation at two distinct Indian subcontinental urban locations
作者: Kanawade V ; P ; , Tripathi S ; N ; , Siingh D ; , Gautam A ; S ; , Srivastava A ; K ; , Kamra A ; K ; , Soni V ; K ; , Sethi V
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 96 起始页码: 370
结束页码: 379
语种: 英语
英文关键词: Formation rate
; Growth
; Particle size distribution
; Ultrafine particles
; Urban
Scopus关键词: Atmospheric aerosols
; Condensation
; Growth (materials)
; Particle size
; Particle size analysis
; Sun
; Atmospheric aerosol particles
; Environmental conditions
; Formation rates
; New particle formation
; Particle growth rates
; Particle number concentration
; Ultrafine particle
; Urban
; Urban growth
; aerosol
; condensation
; environmental conditions
; high temperature
; observational method
; particle size
; size distribution
; urban growth
; aerosol
; air pollution
; air temperature
; article
; biomass
; boundary layer
; circadian rhythm
; climate
; dust
; environmental parameters
; growth rate
; high temperature
; India
; meteorology
; particle size
; priority journal
; solar radiation
; urban area
; India
; Kanpur
; Maharashtra
; Pune
; Uttar Pradesh
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: While the formation of new atmospheric aerosol particles and their subsequent growth have been observed under diverse environmental conditions globally, such observations are very scarce over Indian subcontinent. Here, we present the systematic analysis for new particle formation (NPF) from two distinct urban locations in India during April-May of two consecutive years. Particle size distributions were measured at Pune (18.53°N, 73.85°E) during 16 April-23 May, 2012 and at Kanpur (26.46°N, 80.32°E) during 16 April-23 May, 2013. The campaign mean total particle number concentration in the similar size range of 4-135nm at Pune (12.2×103cm-3) was higher than at Kanpur (7.9×103cm-3), whereas the estimated total condensation sink (CS4-750) at Pune (16.2×10-3s-1) was lower than at Kanpur (33.3×10-3s-1). Despite lower particle number concentrations at Kanpur, larger particle sizes resulted in higher condensation sink than at Pune. The mean particle mode diameter at Kanpur was found larger by a factor of ~1.8 than at Pune. NPF events were observed commonly at both sites, with lower frequency at Kanpur (14%) than that at Pune (26%). The derived particle growth rates, GR, and the formation rates of 5nm particles, J5, ranged from 3.4 to 13.3nmh-1 and 0.4 to 13.9cm-3s-1, respectively, which are generally comparable to typical values reported in previous studies. Generally, the particle growth rates were found higher at Kanpur, whereas the formation rates were higher at Pune. It appears that the presence of pre-existing large particles at Kanpur than at Pune suppressed formation rates and favored particle growth. Overall, NPF occurred at lower condensation sink, lower RH, higher solar radiation, and higher temperature. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81243
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil Engineering, Indian Institute of Technology, Kanpur, India; Indian Institute of Tropical Meteorology, Pune, India; Indian Institute of Tropical Meteorology (Branch), Prof Ramnath Vij Marg, New Delhi, India; India Meteorological Department, Lodhi Road, New Delhi, India; Center for Environmental Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
Recommended Citation:
Kanawade V,P,, Tripathi S,et al. Observations of new particle formation at two distinct Indian subcontinental urban locations[J]. Atmospheric Environment,2014-01-01,96