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    Stable carbon and nitrogen isotopic composition of PM10 over Indo-Gangetic Plains (IGP), adjoining regions and Indo-Himalayan Range (IHR) during a winter 2014 campaign

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    Date
    2018
    Author
    Sen, A.
    Karapurkar, S.G.
    Saxena, M.
    Shenoy, D.M.
    Chaterjee, A.
    Choudhuri, A.K.
    Das, T.
    Khan, A.H.
    Kuniyal, J.C.
    Pal, S.
    Singh, D.P.
    Sharma, S.K.
    Kotnala, R.K.
    Mandal, T.K.
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    Abstract
    For source identification, a field campaign involving simultaneous sampling of particulate matter (PM10) was conducted at eight sampling sites in the Indian mainland during winter 2014. The sampling sites include Delhi (upper IGP), Lucknow (middle IGP), and Kolkata (lower IGP) in the Indo-Gangetic Plains (IGP); Mohal-Kullu and Darjeeling in the Indo-Himalayan Range (IHR). In addition, Ajmer, located upwind of the IGP in NW-India and Giridih and Bhubaneswar, in the downwind to the IGP has also been chosen. To characterize the sources of the ambient PM10, stable isotope ratios of carbon (-13CTC) and nitrogen (-15NTN) for the total carbon (TC) and total nitrogen (TN) fractions have been considered. Ancillary chemical parameters, such as organic carbon (OC), elemental carbon (EC), and water-soluble ionic components (WSIC) mass concentrations are also presented in this paper. There was very small variation in the daily average -13CTC ratios (--24.8 to --25.9�) among the sites. Comparison with end-member stable C isotopic signatures of major typical sources suggests that the PM10 at the sites was mainly from fossil fuel and biofuel and biomass combustion. Daily average -15NTN ratios were not observed to vary much between sites either (8.3 to 11.0�), and the low -15NTN levels also indicate substantial contributions from biofuel and biomass burning of primarily C3 and C4 plant matter
    URI
    https://doi.org/10.1007/s11356-018-2567-0
    http://drs.nio.org/drs/handle/2264/8062
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