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Weekly periodicities of aerosol properties observed at an urban location in India

Satheesh, SK and Vinoj, V and Moorthy, Krishna K (2011) Weekly periodicities of aerosol properties observed at an urban location in India. In: Atmospheric Research, 101 (1-2). pp. 307-313.

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Official URL: http://dx.doi.org/10.1016/j.atmosres.2011.03.003


Multi-year (similar to 7 years) observations of aerosol optical and microphysical properties were conducted at a tropical urban location in Bangalore, India. As a consequence of rapid urbanization, Bangalore presents high local atmospheric emissions, which makes it an interesting site to study the effect of anthropogenic activities on aerosol properties. It has been found that both column (aerosol optical depth, AOD) and ground-level measurements (black carbon (BC) and composite aerosol mass) exhibit a weekly cycle with low aerosol concentrations on weekends. In comparison to the weekdays, the weekend reductions of aerosol optical depth, black carbon and composite aerosol mass concentrations were similar to 15%, 25% and 24%, respectively. The magnitude of weekend reduction of black carbon is as much as similar to 1 mu g m(-3). The similarity in the weekly cycle between the column and surface measurements suggests that the aerosol column loading at this location is governed by local anthropogenic emissions. The strongest weekly cycle in composite aerosol mass concentration was observed in the super micron mass range (>1 mu m). The weekly cycle of composite aerosol mass in the sub micron mass range (<1 mu m) was weak in comparison to the super micron aerosol mass. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Publication: Atmospheric Research
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Aerosols;Anthropogenic effects;Black carbon;Optical depth
Department/Centre: Division of Mechanical Sciences > Divecha Centre for Climate Change
Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 29 Jul 2011 10:53
Last Modified: 29 Jul 2011 10:53
URI: http://eprints.iisc.ac.in/id/eprint/39612

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