globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.atmosres.2018.09.016
Scopus ID: 2-s2.0-85053845579
Year-long variability of the fossil fuel and wood burning black carbon components at a rural site in southern Delhi outskirts
Author: Dumka U.C.; Kaskaoutis D.G.; Devara P.C.S.; Kumar R.; Kumar S.; Tiwari S.; Gerasopoulos E.; Mihalopoulos N.
Source Publication: Atmospheric Research
ISSN: 1698095
Publishing Year: 2019
Volume: 216
pages begin: 11
pages end: 25
Language: 英语
Keyword: Aethalometer model ; Black Carbon ; Delhi ; Fossil-fuel combustion ; Wood burning ; WRF-Chem
Scopus Keyword: Atmospheric thermodynamics ; Boundary layers ; Carbon ; Mixing ; Waste incineration ; Wood ; Aethalometer ; Black carbon ; Delhi ; Fossil fuel combustion ; Wood burning ; WRF-Chem ; Fossil fuels ; atmospheric chemistry ; black carbon ; burning ; combustion ; concentration (composition) ; fossil fuel ; modeling ; rural area ; weather forecasting ; wood ; Delhi ; India
English Abstract: This study examines year-long (April 2015 – March 2016) measurements of black carbon (BC) concentrations acquired with a 7-wavelength Aethalometer (ΑΕ-42) at Panchgaon, in the southern Delhi outskirts. We assess the seasonality of BC concentrations and focus on the quantification of the relative contributions from fossil-fuel combustion (BCff) and wood burning (BCwb) on annual basis. Significant monthly, daily and diurnal variability in both BC components is found due to seasonal changes in the emission sources, dispersion conditions, and boundary-layer dynamics. The annual-mean BC concentration at 880 nm is 7.2 ± 0.3 μg m−3 (range of 0.09–38.6 μg m−3), exhibiting the highest values in winter (9.3 ± 0.7 μg m−3) and the lowest (4.6 ± 0.2 μg m−3) in summer monsoon. BCff (mean of 5.9 ± 0.2 μg m−3) is estimated to account for 81% of the BC mass on annual basis, while the BCwb ranges from 0.55 ± 0.06 μg m−3 in July to 2.7 ± 0.2 μg m−3 in December. The highest BCff/BC fraction is observed in April–June (~86–87% at 880 nm), while the BCwb/BC peaks in October–December (23–29% at 880 nm). The BCff contribution increases in the early-morning hours due to traffic, while the BCwb fraction peaks during the evening and night hours in winter, due to wood and waste material burning for heating. The BC diurnal pattern is highly affected by the mixing-layer height variations, leading to lower concentrations around noon, when the vertical mixing and dilution processes are the strongest. The WRF-Chem model simulations represent rather satisfactorily the BC concentrations and diurnal patterns in summer, but fail to reproduce the BC peaks during late post-monsoon and winter, suggesting the need for refinement of the BC emissions, simulations of local meteorology, and/or boundary-layer dynamics. © 2018 Elsevier B.V.
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被引频次[WOS]:5   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, 263 001, India; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Athens, GR-11810, Greece; Amity Centre for Ocean-Atmospheric Science and Technology, University of Haryana, Gurugram, 122413, India; National Center for Atmospheric Research, Boulder, CO 80301-3000, United States; Indian Institute of Tropical Meteorology, New Delhi Branch, New Delhi, India; Environmental Chemical Processes Laboratory, University of Crete, Crete, 71003, Greece

Recommended Citation:
Dumka U.C.,Kaskaoutis D.G.,Devara P.C.S.,et al. Year-long variability of the fossil fuel and wood burning black carbon components at a rural site in southern Delhi outskirts[J]. Atmospheric Research,2019-01-01,216
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