Elucidating the impacts of aerosol radiative effects for mitigating surface O3 and PM2.5 in Delhi, India during crop residue burning period

Lakhima Chutia; Jun Wang; Huanxin Zhang; Xi Chen; Lorena Castro Garcia; Nathan Janechek

doi:10.1016/j.atmosenv.2024.120890

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Elucidating the impacts of aerosol radiative effects for mitigating surface O3 and PM2.5 in Delhi, India during crop residue burning period

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Elucidating the impacts of aerosol radiative effects for mitigating surface O3 and PM2.5 in Delhi, India during crop residue burning period

Lakhima Chutia, Jun Wang, Huanxin Zhang, Xi Chen, Lorena Castro Garcia and Nathan Janechek

Atmospheric environment (1994), Vol.339, 120890

12/2024

DOI: 10.1016/j.atmosenv.2024.120890

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Abstract

Atmospheric aerosol radiative effects regulate surface air pollution (O3 and PM2.5) via both the aerosol–photolysis effect (APE) and the aerosol–radiation feedback (ARF) on meteorology. Here, we elucidate the roles of APE and ARF on surface O3 and PM2.5 in the heavily polluted megacity, Delhi, India by using a regional model (WRF-Chem) with constraints from limited surface observations. While APE reduces surface O3 (by 6.1%) and PM2.5 concentrations (by 2.4% via impeding the secondary aerosol formations), ARF contributes to a 2.5% and 17.5% increase in surface O3 and PM2.5, respectively. The ARF from smoke enhances PM2.5 (by 8%), black carbon (by 10%), and primary organic aerosol (by 18%) during late autumn when crop residue burning is significant. The synergistic APE and ARF have a negligible impact on the total concentrations of O3 and PM2.5. Hence, the reduction of PM2.5 may lead to O3 escalation due to weakened APE. Sensitivity experiments indicate the need and effectiveness of reducing VOC emission for the co-benefits of mitigating both O3 and PM2.5 concentrations in Delhi. •The aerosol–photolysis effect (APE) contributes to a reduction in surface O3 and PM2.5 concentration in Delhi during post-monsoon.•A notable influence of APE and Aerosol Radiative Feedback (ARF) on O3 and PM2.5 attributed to smoke is simulated during the crop residue burning period.•Control of urban VOC helps both O3 and PM2.5 reductions in Delhi, even after considering biomass burning emissions.

aerosol radiative effects

crop residue burning

Indian air quality

photolysis

PM2.5

Details

Title: Subtitle: Elucidating the impacts of aerosol radiative effects for mitigating surface O3 and PM2.5 in Delhi, India during crop residue burning period
Creators: Lakhima Chutia - University of Iowa, Iowa Technology Institute
Jun Wang - Department of Chemical and Biochemical Engineering, College of Engineering, University of Iowa, IA, USA
Huanxin Zhang - University of Iowa
Xi Chen - University of Iowa, Iowa Technology Institute
Lorena Castro Garcia - University of Iowa
Nathan Janechek - University of Iowa
Resource Type: Journal article
Publication Details: Atmospheric environment (1994), Vol.339, 120890
Publisher: Elsevier Ltd
DOI: 10.1016/j.atmosenv.2024.120890
ISSN: 1352-2310
eISSN: 1873-2844
Grant note: NASA Atmospheric Composition Modeling and Analysis Program (ACMAP): 80NSSC19K0950 Multi-Angle Imager for Aerosols (MAIA): H389700
We sincerely thank NASA Atmospheric Composition Modeling and Analysis Program (ACMAP, award number 80NSSC19K0950) and Multi-Angle Imager for Aerosols (MAIA, award number: H389700) satellite mission for funding this research. The authors acknowledge the High-Performance Computing at the University of Iowa for model simulations.
Language: English
Electronic publication date: 10/22/2024
Date published: 12/2024
Academic Unit: Physics and Astronomy; Electrical and Computer Engineering; Chemical and Biochemical Engineering; Iowa Technology Institute; Civil and Environmental Engineering
Record Identifier: 9984738390702771

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