DOI: 10.1016/j.atmosenv.2014.02.009
Scopus记录号: 2-s2.0-84896037729
论文题名: Primary and secondary aerosols from an urban site (Kanpur) in the Indo-Gangetic Plain: Impact on CCN, CN concentrations and optical properties
作者: Ram K ; , Tripathi S ; N ; , Sarin M ; M ; , Bhattu D
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 89 起始页码: 655
结束页码: 663
语种: 英语
英文关键词: CCN and CN concentrations
; EC
; Indo-gangetic plain
; Mixing state
; OC
Scopus关键词: Mixing
; Optical properties
; Urban growth
; Chemical compositions
; Cloud condensation nuclei
; EC
; Indo-Gangetic Plains
; Microphysical property
; Mixing state
; Morphological features
; OC
; Aerosols
; carbon
; nitrate
; organic carbon
; aerosol composition
; aerosol formation
; aerosol property
; cloud condensation nucleus
; cloud microphysics
; concentration (composition)
; urban atmosphere
; absorption
; aerosol
; air and air related phenomena
; air pollution
; article
; chemical composition
; circadian rhythm
; cloud
; cloud condensation nucleus
; concentration (parameters)
; India
; molecular weight
; optics
; particle size
; particulate matter
; priority journal
; submicron aerosol
; urban area
; wettability
; Gangetic Plain
; India
; Kanpur
; 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: The number concentrations of cloud condensation nuclei (CCN) and submicron aerosols (CN), along with their chemical composition and optical properties, have been studied during October 2008, October-November 2009 and November 2010 from an urban (Kanpur) site in the Indo-Gangetic Plain (IGP). The concentrations of CCN and CN and their optical properties vary with primary emission and secondary aerosol formation. The CCN (at 0.38% super-saturation) and CN concentrations varied from ~3900 to 15,000cm-3 and ~23,000 to 99,000cm-3, respectively. The diurnal variability of CCN and CN show peak concentrations during early morning hours (6:00-9:00 AM) and nighttime (7:00-10:00 PM), attributable to variability in source strength of carbonaceous aerosols and secondary aerosol formation. The CCN and CN concentrations are ~50% higher during nighttime with simultaneous increase in organic carbon (OC), elemental carbon (EC) and NO3- mass concentrations. However, CCN/CN ratios are similar during day and nighttime suggesting their co-variability with primary and secondary aerosol formation. The CCN/CN ratios are relatively lower (range: 0.11-0.33) than global average value and those over urban areas (with similar chemical composition in China and around the world) suggesting suppressed activation and hygroscopic growth in highly polluted environment of the IGP. The average mass absorption efficiency of EC during daytime (11.7±2.5m2g-1) is about factor of two higher than that during nighttime (5.7±1.3m2g-1). These results have implications to study morphological features, mixing state and microphysical properties of aerosols under high acidic environment over northern India. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81011
Appears in Collections: 气候变化事实与影响
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作者单位: Geosciences Division, Physical Research Laboratory, Ahmedabad 380009, India; Environmental Materials Division, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India; Department of Civil Engineering, Indian Institute of Technology, Kanpur 208016, India
Recommended Citation:
Ram K,, Tripathi S,N,et al. Primary and secondary aerosols from an urban site (Kanpur) in the Indo-Gangetic Plain: Impact on CCN, CN concentrations and optical properties[J]. Atmospheric Environment,2014-01-01,89