globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2018.02.048
Scopus ID: 2-s2.0-85042712105
Seasonal variability in chemical composition and source apportionment of sub-micron aerosol over a high altitude site in Western Ghats, India
Author: Mukherjee S; , Singla V; , Pandithurai G; , Safai P; D; , Meena G; S; , Dani K; K; , Anil Kumar V
Source Publication: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
Publishing Year: 2018
Volume: 180
pages begin: 79
pages end: 92
Language: 英语
Keyword: ACSM ; Cluster analysis ; CWT ; IEPOX-OA ; PMF
Scopus Keyword: 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
Subject of Scopus: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
English Abstract: 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
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Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: 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
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