Sökning: L773:2169 8996 OR L773:2169 897X > Carbon isotope-cons...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 04004naa a2200445 4500 | |
001 | oai:DiVA.org:su-144828 | |
003 | SwePub | |
008 | 170710s2017 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1448282 URI |
024 | 7 | a https://doi.org/10.1002/2016JD0256342 DOI |
040 | a (SwePub)su | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Bikkina, Srinivasu Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi4 aut0 (Swepub:su)sbikk |
245 | 1 0 | a Carbon isotope-constrained seasonality of carbonaceous aerosol sources from an urban location (Kanpur) in the Indo-Gangetic Plain |
264 | 1 | c 2017 |
338 | a print2 rdacarrier | |
520 | a The Indo-Gangetic Plain (IGP) in northern India, Pakistan, and Bangladesh is a major source of carbonaceous aerosols in South Asia. However, poorly constrained seasonality of their sources over the IGP leads to large uncertainty in climate and health effects. Here we present a first data set for year-round radiocarbon (C-14) and stable carbon (C-13)-based source apportionment of total carbon (TC) in ambient PM10 (n = 17) collected from an urban site (Kanpur: 26.5 degrees N, 80.3 degrees E) in the IGP during January 2007 to January 2008. The year-round C-14-based fraction biomass (f(bio-TC)) estimate at Kanpur averages 777% and emphasizes an impact of biomass burning emissions (BBEs). The highest f(bio-TC) (%) is observed in fall season (October-November, 856%) followed by winter (December-February, 804%) and spring (March-May, 758%), while lowest values are found in summer (June-September, 69 +/- 2%). Since biomass/coal combustion and vehicular emissions mostly contribute to carbonaceous aerosols over the IGP, we predict C-13(TC) (C-13(pred)) over Kanpur using known C-13 source signatures and the measured C-14 value of each sample. The seasonal variability of C-13(obs)-C-13(pred) versus C-14(TC) together with air mass back trajectories and Moderate Resolution Imaging Spectroradiometer fire count data reveal that carbonaceous aerosols in winter/fall are significantly influenced by atmospheric aging (downwind transport of crop residue burning/wood combustion emissions in the northern IGP), while local sources (wheat residue combustion/vehicular emissions) dominate in spring/summer. Given the large temporal and seasonal variability in sources and emission strength of TC over the IGP, C-14-based constraints are, thus, crucial for reducing their uncertainties in carbonaceous aerosol budgets in climate models. | |
650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng |
653 | a radiocarbon | |
653 | a stable carbon isotope | |
653 | a Indo-Gangetic Plain | |
653 | a South Asia | |
653 | a carbonaceous aerosols | |
653 | a biomass burning emissions | |
700 | 1 | a Andersson, Augustu Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi4 aut0 (Swepub:su)auand |
700 | 1 | a Ram, Kirpa4 aut |
700 | 1 | a Sarin, M. M.4 aut |
700 | 1 | a Sheesley, Rebecca J.u Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi4 aut |
700 | 1 | a Kirillova, Elena N.u Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi4 aut |
700 | 1 | a Rengarajan, R.4 aut |
700 | 1 | a Sudheer, A. K.4 aut |
700 | 1 | a Gustafsson, Örjanu Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi4 aut0 (Swepub:su)ogust |
710 | 2 | a Stockholms universitetb Institutionen för miljövetenskap och analytisk kemi4 org |
773 | 0 | t Journal of Geophysical Research - Atmospheresg 122:9, s. 4903-4923q 122:9<4903-4923x 2169-897Xx 2169-8996 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-144828 |
856 | 4 8 | u https://doi.org/10.1002/2016JD025634 |
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