DOI: 10.1016/j.atmosenv.2014.05.046
Scopus记录号: 2-s2.0-84901338575
论文题名: Infrequent occurrence of new particle formation at a semi-rural location, Gadanki, in tropical Southern India
作者: Kanawade V ; P ; , Shika S ; , Pöhlker C ; , Rose D ; , Suman M ; N ; S ; , Gadhavi H ; , Kumar A ; , Nagendra S ; M ; S ; , Ravikrishna R ; , Yu H ; , Sahu L ; K ; , Jayaraman A ; , Andreae M ; O ; , Pöschl U ; , Gunthe S ; S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 94 起始页码: 264
结束页码: 273
语种: 英语
英文关键词: Nucleation
; Particle size distribution
; Semi-rural
; Tropics
Scopus关键词: Aerosols
; Atmospheric thermodynamics
; Nucleation
; Particle size analysis
; Sun
; Mean and standard deviations
; Meteorological parameters
; New particle formation
; Particle growth rates
; Particle number size distribution
; Semi-rural
; Spatio-temporal scale
; Wind speed and directions
; Tropics
; aerosol formation
; aerosol property
; concentration (composition)
; nucleation
; particle size
; rural atmosphere
; seasonality
; size distribution
; solar radiation
; aerosol
; article
; gas
; height
; humidity
; India
; meteorology
; new particle formation
; oxidation
; particle size
; precursor
; priority journal
; rural area
; season
; solar radiation
; temperature
; velocity
; wind
; Gadanki
; India
; Tamil Nadu
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: We report first measurements of ultrafine particles from a semi-rural location, Gadanki, from tropical Southern India. Measurements of particle number size distributions in the diameter range of 5nm-32μm were performed during 2 May-31 July 2012. The mean number concentrations of nucleation (NNUC), Aitken (NAIT), accumulation (NACCU), and total particles (NTOT) at this site were (1.1±0.9)×103cm-3, (2.2±1.3)×103cm-3, (1.5±1.2)×103cm-3 and (4.8±2.4)×103cm-3, respectively, comparable to other rural to semi-rural locations globally and declined as the season progressed, perhaps due to wet removal of aerosols with onset of monsoon in early June. Particle bursts in the nucleation mode size range (5-25nm), followed by a sustained growth in size were observed very rarely (only 5 out of 79 observation days) at this site, less frequently than at most other locations around the world during May-July. Most factors affecting new particle formation (NPF) were similar on NPF and nonNPF event days, such as condensation sink, relative humidity, temperature, wind speed and direction, and mixing layer height. Thus, the infrequent occurrence of NPF at our site appeared to be linked to lower precursor gas concentrations and weak gas-phase oxidation chemistry due to diminished solar radiation on persistently cloudy days with the onset of the monsoon in early June over this region. The derived particle growth rates (GR>5nm) and formation rates of 5nm particles (J5) ranged from 2.2 to 4.7nmh-1 and 0.4-2.4cm-3s-1, with a mean and standard deviation of 3.4±0.9nmh-1 and 1.2±2.3cm-3s-1, respectively, comparable to previous investigations at rural to semi-rural locations. The observed behavior in aerosol and meteorological parameters on NPF and nonNPF event days appeared to be distinctive compared to other rural to urban locations across the globe. However, this distinct behavior is limited and restricted to this site and season of the year, and should therefore not be generalized over a larger spatio-temporal scale. This emphasizes the need for long-term aerosol and precursor measurements over this and other regions of India. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81076
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Civil Engineering, Indian Institute of Technology, Kanpur, India; Department of Civil Engineering, Indian Institute of Technology, Chennai, India; Max Planck Institute for Chemistry, Biogeochemistry and Multiphase Chemistry Departments, P.O. Box 3060, Mainz, Germany; National Atmospheric Research Laboratory, Gadanki, Tirupati, India; Department of Chemical Engineering, Indian Institute of Technology, Chennai, India; Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Physical Research Laboratory, Ahmedabad, India; Institute for Atmospheric and Environmental Sciences, Goethe University, Frankfurt am Main, Germany
Recommended Citation:
Kanawade V,P,, Shika S,et al. Infrequent occurrence of new particle formation at a semi-rural location, Gadanki, in tropical Southern India[J]. Atmospheric Environment,2014-01-01,94