Seasonal Characteristics, Sources and Pollution Pathways of PM10 at High Altitudes Himalayas of India
نویسندگان
چکیده
The present study represents the annual and seasonal concentration of PM10 over different sites (Darjeeling, Nainital, Mohal-Kullu) across Himalayan region India from July 2018 to December 2019. collected samples were analyzed for carbonaceous aerosols [organic carbon (OC), elemental (EC), water-soluble organic (WSOC), primary (POC), secondary (SOC)] major trace elements inspect their possible sources. average concentrations Mohal-Kullu, Darjeeling recorded as 57 ± 32 µg m-3, 65 41 m-3 54 17 respectively. high OC/EC ratio significant correlation OC with EC WSOC indicated a effect biomass burning sites. Principal component analysis/absolute principal score (PCA/APCS) resolved four sources: crustal/soil dust (26.6%), burning/fossil fuel combustion (28%), vehicular emissions industrial emissions/coal (17%). Identification source using potential contribution function (PSCF) weighted trajectories (CWT) showed that mainly transported northwestern part (Haryana, Punjab), northeastern Pakistan, Thar Desert, Indo-Gangetic Plain (IGP), which contributed dust-related India.
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ژورنال
عنوان ژورنال: Aerosol and Air Quality Research
سال: 2022
ISSN: ['2071-1409', '1680-8584']
DOI: https://doi.org/10.4209/aaqr.220092