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Tropical urban aerosol distributions during pre-sunrise and post-sunset as observed with lidar and solar radiometer at Pune, India

Tiwari, YK and Devara, PCS and Raj, PE and Maheskumar, RS and Pandithurai, G and Dani, KK (2003) Tropical urban aerosol distributions during pre-sunrise and post-sunset as observed with lidar and solar radiometer at Pune, India. Journal of Aerosol Science, 34 (4). pp. 449-458.

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Abstract

The pre-sunrise and post-sunset differences in the tropical urban aerosol distributions have been studied by conducting coordinated experiments using a continuous wave, bistatic Argon ion lidar and a spectroradiometer at the Indian Institute of Tropical Meteorology, Pune, India during 1997-2000. The results of the study indicate higher aerosol concentration in the air layers close to the ground, and lower concentration aloft on all the days of observations. Further, the concentrations are found to be greater in the early-morning (pre-sunrise) hours and lower in the late-evening (post-sunset) hours during the winter season and vice versa during the pre-monsoon season. These deviations are considered to be due to the convective activity and associated turbulent mixing during the pre-monsoon and close-to-ground and elevated haze layer formations during the winter months over the experimental station.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier Science
Uncontrolled Keywords: Argon; Atmospheric turbulence; Meteorology; Optical radar; Radiometers; Spectrum analysis, Monsoons; Post-sunset differences, Aerosols, argon, aerosol, aerosol; article; haze; priority journal; radiation detector; season; solar radiation
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 20 Apr 2015 18:07
Last Modified: 20 Apr 2015 18:07
URI: http://moeseprints.incois.gov.in/id/eprint/1506

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