Assessment of biomass burning and fossil fuel contribution to black carbon concentrations in Delhi during winter.
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| Title: | Assessment of biomass burning and fossil fuel contribution to black carbon concentrations in Delhi during winter. |
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| Authors: | Dumka, U.C.1, Kaskaoutis, D.G.1,2 dkask@meteo.noa.gr, Tiwari, S.3, Safai, P.D.4, Attri, S.D.5, Soni, V.K.5, Singh, N.1, Mihalopoulos, N.2,6 |
| Source: | Atmospheric Environment. Dec2018, Vol. 194, p93-109. 17p. |
| Subject Terms: | *Biomass burning, *Fossil fuels, *Soot, *Combustion, Pyrography |
| Abstract: | Abstract This study aims to assess the contribution of fossil-fuel combustion (BC ff) and biomass (or wood) burning (BC wb) to wintertime black carbon (BC) concentrations in Delhi using the "Aethalometer model" approach. Continuous measurements using 7-wavelength Aethalometer (AE-33) were taken from December 2015 to February 2016 in Delhi downtown, as part of a multi-instrument research campaign, revealing high BC concentrations of 24.4 ± 12.2 μg m−3 (range from 3.2 to 59.9 μg m−3). The BC ff contribution dominates with an average fraction of 72% at 880 nm, indicating an important contribution from biomass burning (28%). The daily-averaged Absorption Ångström Exponent (AAE 370-880) varies between 1.08 and 1.46 due to changes in the BC emission rates, variations in the relative strength between fossil-fuel and wood-burning sources and mixing processes in the atmosphere. The average BC ff /BC wb ratio is estimated as 2.90 ± 1.47 at 880 nm, while the BC wb contribution maximized in the evening hours due to enhanced wood burning for heating. The BC, BC ff and BC wb concentrations exhibit remarkable diurnal variations with maximum values in the morning and evening/night hours and lower around noon, primarily driven by changes in the mixing-layer height. The highest BC, BC ff and BC wb concentrations are associated with weak winds (<2 ms−1), revealing a dominance of local emission sources within the Delhi metropolitan area. A sensitivity analysis is performed by changing the wavelength pairs and the pre-assumed AAE values in order to evaluate the stability of the "Aethalometer model" in assessment of the BC source apportionment. The results reveal that the "Aethalometer model" is more sensitive in estimating the BC wb , while the changes in the BC ff component are rather low. Graphical abstract Image 1 Highlights • Daily-mean BC concentrations range from 3.2 to 59.9 μg m−3 in Delhi during winter. • The BC ff vs BC wb estimations are 72% vs 28% at 880 nm. • Dependence of BC ff and BC wb on AAE ff and AAE wb values (Aethalometer model). • Higher BC ff /BC during early morning, higher BC wb /BC in the evening. • Boundary-layer dynamics control the BC concentrations. [ABSTRACT FROM AUTHOR] |
| Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | GreenFILE |
| FullText | Text: Availability: 0 |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 132319022 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Assessment of biomass burning and fossil fuel contribution to black carbon concentrations in Delhi during winter. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Dumka%2C+U%2EC%2E%22">Dumka, U.C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kaskaoutis%2C+D%2EG%2E%22">Kaskaoutis, D.G.</searchLink><relatesTo>1,2</relatesTo><i> dkask@meteo.noa.gr</i><br /><searchLink fieldCode="AR" term="%22Tiwari%2C+S%2E%22">Tiwari, S.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Safai%2C+P%2ED%2E%22">Safai, P.D.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Attri%2C+S%2ED%2E%22">Attri, S.D.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Soni%2C+V%2EK%2E%22">Soni, V.K.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Singh%2C+N%2E%22">Singh, N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mihalopoulos%2C+N%2E%22">Mihalopoulos, N.</searchLink><relatesTo>2,6</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Atmospheric+Environment%22">Atmospheric Environment</searchLink>. Dec2018, Vol. 194, p93-109. 17p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Biomass+burning%22">Biomass burning</searchLink><br />*<searchLink fieldCode="DE" term="%22Fossil+fuels%22">Fossil fuels</searchLink><br />*<searchLink fieldCode="DE" term="%22Soot%22">Soot</searchLink><br />*<searchLink fieldCode="DE" term="%22Combustion%22">Combustion</searchLink><br /><searchLink fieldCode="DE" term="%22Pyrography%22">Pyrography</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract This study aims to assess the contribution of fossil-fuel combustion (BC ff) and biomass (or wood) burning (BC wb) to wintertime black carbon (BC) concentrations in Delhi using the "Aethalometer model" approach. Continuous measurements using 7-wavelength Aethalometer (AE-33) were taken from December 2015 to February 2016 in Delhi downtown, as part of a multi-instrument research campaign, revealing high BC concentrations of 24.4 ± 12.2 μg m−3 (range from 3.2 to 59.9 μg m−3). The BC ff contribution dominates with an average fraction of 72% at 880 nm, indicating an important contribution from biomass burning (28%). The daily-averaged Absorption Ångström Exponent (AAE 370-880) varies between 1.08 and 1.46 due to changes in the BC emission rates, variations in the relative strength between fossil-fuel and wood-burning sources and mixing processes in the atmosphere. The average BC ff /BC wb ratio is estimated as 2.90 ± 1.47 at 880 nm, while the BC wb contribution maximized in the evening hours due to enhanced wood burning for heating. The BC, BC ff and BC wb concentrations exhibit remarkable diurnal variations with maximum values in the morning and evening/night hours and lower around noon, primarily driven by changes in the mixing-layer height. The highest BC, BC ff and BC wb concentrations are associated with weak winds (<2 ms−1), revealing a dominance of local emission sources within the Delhi metropolitan area. A sensitivity analysis is performed by changing the wavelength pairs and the pre-assumed AAE values in order to evaluate the stability of the "Aethalometer model" in assessment of the BC source apportionment. The results reveal that the "Aethalometer model" is more sensitive in estimating the BC wb , while the changes in the BC ff component are rather low. Graphical abstract Image 1 Highlights • Daily-mean BC concentrations range from 3.2 to 59.9 μg m−3 in Delhi during winter. • The BC ff vs BC wb estimations are 72% vs 28% at 880 nm. • Dependence of BC ff and BC wb on AAE ff and AAE wb values (Aethalometer model). • Higher BC ff /BC during early morning, higher BC wb /BC in the evening. • Boundary-layer dynamics control the BC concentrations. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.atmosenv.2018.09.033 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 93 Subjects: – SubjectFull: Biomass burning Type: general – SubjectFull: Fossil fuels Type: general – SubjectFull: Soot Type: general – SubjectFull: Combustion Type: general – SubjectFull: Pyrography Type: general Titles: – TitleFull: Assessment of biomass burning and fossil fuel contribution to black carbon concentrations in Delhi during winter. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Dumka, U.C. – PersonEntity: Name: NameFull: Kaskaoutis, D.G. – PersonEntity: Name: NameFull: Tiwari, S. – PersonEntity: Name: NameFull: Safai, P.D. – PersonEntity: Name: NameFull: Attri, S.D. – PersonEntity: Name: NameFull: Soni, V.K. – PersonEntity: Name: NameFull: Singh, N. – PersonEntity: Name: NameFull: Mihalopoulos, N. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 13522310 Numbering: – Type: volume Value: 194 Titles: – TitleFull: Atmospheric Environment Type: main |
| ResultId | 1 |
