Differential absorption lidar for measurement of SO₂ in the atmosphere

Authors

Ma. Cecilia D. Galvez ⋅ PH National Institute of Physics, University of the Philippines Diliman
Edgar A. Vallar ⋅ PH National Institute of Physics, University of the Philippines Diliman
Minella C. Alarcon ⋅ PH 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.