Differential absorption lidar for measurement of SO₂ in the atmosphere

Authors

Ma. Cecilia D. Galvez National Institute of Physics, University of the Philippines Diliman
Edgar A. Vallar National Institute of Physics, University of the Philippines Diliman
Minella C. Alarcon Department of Physics, Ateneo de Manila University

Abstract

Sulfur dioxide (SO₂) is one of the major air pollutants. In the Philippines the SO₂ Ambient Air Quality Standard is 0.30 ppm and 0.14 ppm for 1-hr and 24-hrs, respectively. There are several reasons why applications of the Differential Absorption Lidar (DIAL) technique to SO₂ are favorable. It has a strong absorption band in the UV wavelength interval, 260 nm–320 nm, for which the laser and detection techniques are well-established and there are no interfering absorbing gases in the atmosphere with the exception of ozone (O₃), which has a comparativdy low differential absorption cross-section. Further the background light is reduced due to absorption by atmospheric ozone layers, and the atmospheric extinction is normally not too great.
This paper will discuss design considerations of a typical DIAL system for remote measurement of SO₂ in the atmosphere.

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Issue

1994: Proceedings of the 12th National Physics Congress of the Samahang Pisika ng Pilipinas

Article ID

SPP-1994-IP-08

Section

Instrumentation and Computational Physics

Published

1994-10-15

How to Cite

[1]

MCD Galvez, EA Vallar, and MC Alarcon, Differential absorption lidar for measurement of SO2 in the atmosphere, Proceedings of the Samahang Pisika ng Pilipinas 12, SPP-1994-IP-08 (1994). URL: https://proceedings.spp-online.org/article/view/SPP-1994-IP-08.