DOI: 10.1016/j.atmosenv.2014.04.055
Scopus记录号: 2-s2.0-84899904910
论文题名: Characterization of carbonaceous aerosols over the urban tropical location and a new approach to evaluate their climatic importance
作者: Safai P ; D ; , Raju M ; P ; , Rao P ; S ; P ; , Pandithurai G
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 493
结束页码: 500
语种: 英语
英文关键词: Effective carbon ratio
; OC/EC ratio
; Organic and elemental carbon
; Primary and secondary organic carbon
Scopus关键词: Aerosols
; Atmospheric thermodynamics
; Carbon
; Combustion
; Industrial emissions
; Organic carbon
; Atmospheric concentration
; Carbon ratio
; Meteorological condition
; OC/EC ratio
; Organic and elemental carbon
; Primary organic carbons
; Secondary organic carbon
; Secondary organic carbons (SOC)
; Atmospheric movements
; black carbon
; carbon
; fossil fuel
; hydrogen
; nitrogen
; organic carbon
; oxygen
; air sampling
; article
; atmosphere
; boundary layer
; burn
; climate
; combustion
; controlled study
; dry deposition
; environmental temperature
; India
; meteorology
; methodology
; molecular weight
; observational study
; photooxidation
; primary organic aerosol
; priority journal
; seasonal variation
; secondary organic aerosol
; summer
; tropics
; urban area
; wet deposition
; winter
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: Increasing emissions from fossil-fuel, biomass burning, land use changes and industrial growth have led to rapid increase in the atmospheric concentrations of carbonaceous species over many cities in India. The present paper deals with the results obtained from year long (2012-13) observations conducted at a tropical urban location, Pune in southwestern India on Organic and Elemental Carbon as well as Black Carbon; using the Sunset OCEC Analyzer and Aethalometer, respectively. The average mass concentrations of OC and EC were in the order of winter>post-monsoon>summer>monsoon. Mean annual OC/EC ratio was found to be 2.4±1.1 during the study period, suggesting the presence of secondary organic carbon (SOC). Estimated SOC was found to form 47% of OC mass concentration. OC and EC were also significantly well correlated (r=0.95, p<0.0001) to each other, indicating towards common combustion sources. The primary organic carbon (POC) dominated over SOC and EC in post-monsoon and winter seasons indicating impact of anthropogenic burning activity, enhanced by prevailing meteorological conditions as well as that of long range transport. Mean annual POC+EC/TC ratio was 0.69 indicating that more than 2/3 of TC is formed from combustion sources. Thermally derived EC and optically derived BC correlated very well (r=0.98, p<0.0001). A new concept e.g. Effective carbon ratio (ECR) is suggested to better assess the scattering/absorptive nature and probable source identification of carbonaceous aerosols in place of conventional OC/EC ratio. © 2014 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80976
Appears in Collections: 气候变化事实与影响
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作者单位: Indian Institute of Tropical Meteorology, Pune 411 008, India
Recommended Citation:
Safai P,D,, Raju M,et al. Characterization of carbonaceous aerosols over the urban tropical location and a new approach to evaluate their climatic importance[J]. Atmospheric Environment,2014-01-01,92