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High-spectral-resolution radiometric measurements of aerosol extinction over an urban region in India

Devara, PCS and Ramkumar, M and Maheskumar, RS and Pandithurai, G (2001) High-spectral-resolution radiometric measurements of aerosol extinction over an urban region in India. Measurement Science and Technology, 12 (6). pp. 691-697.

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Abstract

Concurrent observations of aerosol optical depth (AOD) were carried out using a high-spectral-resolution radiometer (HSRR) and solar radiometer (SR) at the Indian Institute of Tropical Meteorology (IITM), Pune, India, on all clear-sky days available during November 1995-February 1996. The HSRR observations were collected at 5 nm intervals throughout the 400-700 nm spectrum while the SR measurements were made at discrete wavelengths of 400, 600, 940, 1060 and 1630 nm. In order to study the effect of integrated spectral observations on the derived AODs as compared to such depths from a single spectrum, multi-spectral observations at 2 nm intervals were collected. The AODs and their wavelength dependence from the HSRR and SR are compared and fairly good agreement found. The HSRR derived AODs at 400 nm and 700 nm from the present data sets are compared with those obtained during the winters of 1993-94 and 1994-95. The results reveal greater AODs, indicating abundance of aerosol particle concentration, during 1995-96 as compared to 1993-94 and 1994-95.

Item Type: Article
Additional Information: Copyright of this article belongs to IOP Publishing Limited
Uncontrolled Keywords: Radiometry; Spectrum analysis, Aerosol optical depth (AOD), Atmospheric aerosols, aerosol; optical depth; radiometer; remote sensing; solar radiation; urban area, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 14 Mar 2015 04:23
Last Modified: 14 Mar 2015 04:23
URI: http://moeseprints.incois.gov.in/id/eprint/1574

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