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Differential absorption lidar probing of atmospheric ozone over a tropical urban station in India

Devara, PCS and Raj, PE and Pandithurai, G and Dani, KK and Sonbawne, SM and Rao, YJ (2007) Differential absorption lidar probing of atmospheric ozone over a tropical urban station in India. Measurement Science and Technology, 18 (3). pp. 639-644.

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Abstract

An ultra-violet (UV) rare-gas halide XeCl excimer-Raman laser-based ozone lidar system has been developed and installed at the Indian Institute of Tropical Meteorology (IITM), Pune (18°43'N, 73°51'E, 559 m above mean sea level), India. This system essentially operates in the differential-absorption-lidar (DIAL) mode with laser emission at 308 nm ('on') wavelength as well as reference ('off') wavelength of 353 nm generated by stimulated Raman shifting (SRS) the 308 nm radiation in hydrogen. The receiving system consists of a large diameter telescope tailored with a signal detection and data acquisition/ processing system with 5 ns–10.5 ms multi-channel scaler/averager. This paper deals with a brief description of the lidar system developed and discusses the methodology followed for the retrieval of ozone vertical distributions from the lidar back-scattered signals obtained at 'on' and 'off' wavelengths. These initial results are compared with those obtained from a collocated ozonesonde and multi-filter solar radiometer and also with coincident observations from TOMS satellite. They are found to be in fair agreement within the experimental limitations.

Item Type: Article
Additional Information: Copyright of this article belongs to IOP Publishing.
Uncontrolled Keywords: Data acquisition; Excimer lasers; Light absorption; Light emission; Ozone, Atmospheric ozone; Differential absorption; Ozonesonde; Raman wavelength, Optical radar, Data acquisition; Excimer lasers; Light absorption; Light emission; Optical radar; Ozone
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 29 Dec 2014 12:02
Last Modified: 29 Dec 2014 12:02
URI: http://moeseprints.incois.gov.in/id/eprint/1907

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