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Impact assessment of change in anthropogenic emissions due to lockdown on aerosol characteristics in a rural location

Ajay, A and Krishna Moorthy, K and Satheesh, SK and Ilavazhagan, G (2021) Impact assessment of change in anthropogenic emissions due to lockdown on aerosol characteristics in a rural location. In: Current Science, 120 (2). pp. 332-340.

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Official URL: https://doi.org/10.18520/cs/v120/i2/332-340


Long-term and continuous measurements of aerosol concentration and optical properties from the Challakere Climate Observatory, located in a remote rural semi-arid region northwest of Bengaluru, are examined for the impact of the prolonged and phased national lockdown during the COVID-19 pandemic. The analyses revealed that the lockdown, which almost brought all the anthropogenic activities (particularly associated with fossil fuel use such as in transport and industrial sectors) to a standstill and then slowly relaxed in phases, had very little impact on the aerosol properties at this remote site, in sharp contrast to the impacts seen in the major urban conglomerate, Bengaluru, located about 230 km southeast to Challakere. Rather than impacts from anthropogenic sources associated with fossil fuel combustion, the aerosol characteristics at Challakere are strongly influenced by regional and synoptic meteorology. The findings re-emphasize that the emissions from fossil fuel combustion in industrial and automobile sector are the major source of aerosols (especially absorbing type) over urban and semi-urban environments. © 2021. All Rights Reserved.

Item Type: Journal Article
Publication: Current Science
Publisher: Indian Academy of Sciences
Additional Information: The copyright for this article belongs to Indian Academy of Sciences
Department/Centre: Division of Mechanical Sciences > Divecha Centre for Climate Change
Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 24 Mar 2021 05:51
Last Modified: 24 Mar 2021 05:51
URI: http://eprints.iisc.ac.in/id/eprint/68527

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