DOI: 10.1016/j.atmosenv.2018.02.048
Scopus记录号: 2-s2.0-85042712105
论文题名: Seasonal variability in chemical composition and source apportionment of sub-micron aerosol over a high altitude site in Western Ghats, India
作者: Mukherjee S ; , Singla V ; , Pandithurai G ; , Safai P ; D ; , Meena G ; S ; , Dani K ; K ; , Anil Kumar V
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 180 起始页码: 79
结束页码: 92
语种: 英语
英文关键词: ACSM
; Cluster analysis
; CWT
; IEPOX-OA
; PMF
Scopus关键词: Aerosols
; Chemical speciation
; Cluster analysis
; Factorization
; Isoprene
; Mass spectrometry
; Sulfur compounds
; ACSM
; Chemical compositions
; High altitude sites
; IEPOX-OA
; Positive Matrix Factorization
; Potential source regions
; Seasonal variability
; Source apportionment
; Atmospheric thermodynamics
; black carbon
; carbon
; isoprene
; sulfate
; aerosol
; aerosol composition
; aerosol formation
; chemical composition
; cluster analysis
; concentration (composition)
; latitude
; particulate matter
; seasonal variation
; source apportionment
; speciation (chemistry)
; aerosol
; altitude
; Article
; chemical composition
; India
; meteorology
; particulate matter
; priority journal
; seasonal variation
; summer
; time series analysis
; winter
; India
; Mahabaleshwar
; Maharashtra
; Western Ghats
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: This manuscript reports the seasonal variation of chemically speciated sub-micron aerosol particles (diameter < 1 μm). An Aerosol Chemical Speciation Monitor (ACSM) was used to measure the mass concentration of non-refractory particulate matter (NR-PM1) at a high-altitude site in the Western Ghats, India from March 2016 to February 2017. The mass concentration of NR-PM1 averaged at 7.5 ± 6.5 μgm–3, with major contributions from organics (59%) and sulfates (23%). Positive matrix factorization (PMF) was applied on the measured mass spectra of organic aerosol (OA) to derive the sources distinctive of each season (Summer, Monsoon, Post-Monsoon and Winter). The four OA factors (two primary OA and two oxygenated OA) resolved during summer, post-monsoon and winter season. However, only one oxygenated factor resolved during monsoon and contributed only 20% to the total OA. The factors associated with primary emissions dominated during the monsoon, whereas factors related to secondary formation dominated in other three seasons. During summer, an isoprene derived SOA – IEPOX-OA (isoprene-epoxydiol OA) contributed ∼17% to the total OA. Cluster and concentration weighted trajectory (CWT) analyses were performed to identify the possible source regions of NR-PM1 mass concentration observed at the receptor site. The analysis identifies Central India as the potential source region of transported aerosol during post-monsoon and winter season. Our study suggests that contributions from both local sources and regional transport are important in governing mass concentration of PM1 over Mahabaleshwar. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82926
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, India
Recommended Citation:
Mukherjee S,, Singla V,, Pandithurai G,et al. Seasonal variability in chemical composition and source apportionment of sub-micron aerosol over a high altitude site in Western Ghats, India[J]. Atmospheric Environment,2018-01-01,180