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Aerosol pollution and its impact on regional climate during Holi festival inferred from ground-based and satellite remote sensing observations

Simha, CP and Devara, PCS and Saha, SK (2013) Aerosol pollution and its impact on regional climate during Holi festival inferred from ground-based and satellite remote sensing observations. Natural Hazards, 69 (1). pp. 889-903.

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Abstract

In this paper, we report some salient features from a suit of special experiments that have been conducted over a coastal site (Mumbai) during February 23-March 03, 2010, encompassing an Indian festival, namely Holi, using solar radiometers and pyranometer. The results of the analysis of observations at the experimental site show higher (more than double) aerosol optical depth, water vapor, and lower down-welling short-wave radiative flux during the festival period. This is considered to be due to anthropogenic activities and associated meteorological conditions at the experimental location. To illustrate further, Angstrom parameters (alpha, denoting the aerosol size distribution, and beta, representing the loading) are examined. These parameters are found to be greater on Holi day as compared to those on the normal (control, pre-, and post-Holi) days, suggesting an increase in accumulation mode (smaller size) particle loading. The aerosol size spectra exhibited bimodal/power-law distribution with a dominant peak, modulated by anthropogenic activities, involving local and long-range transport of dust and smoke (emanated from biomass-burning) aerosols, which is consistent with MODIS satellite observations. The aerosol direct radiative forcing estimation indicated cooling at the bottom of the atmosphere. © 2013 Springer Science+Business Media Dordrecht.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer.
Uncontrolled Keywords: aerosol; atmospheric pollution; coastal zone; human activity; MODIS; optical depth; ozone; precipitable water; radiative forcing; regional climate; water content; water vapor
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 13 Jun 2014 05:13
Last Modified: 13 Jun 2014 05:13
URI: http://moeseprints.incois.gov.in/id/eprint/337

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