17 October 2007 Air pollution monitoring using the open path technique
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The open-path technique is a widely use method for air pollution monitoring, being capable of detecting trace gases down to ppb concentrations. Using this technique, the DOAS system can measure simultaneously several types of atmospheric molecular compounds having UV absorption spectra, by averaging on a long optical path (hundreds of meters). In this paper, two kinds of comparative measurements by DOAS and in situ detectors (using the point monitoring technique), in high polluted areas from Bucharest and the surroundings, are presented and analyzed. Only point monitoring is a standardized technique and therefore by comparing the two methods, several strengths and weaknesses of the open path technique will be evidentiated. This study is intended to mark out main environmental conditions (e.g. atmospheric fluctuations, topography) responsible for important differences that appear between experimental data acquired with the two techniques.
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L. Belegante, L. Belegante, D. Zisu, D. Zisu, I. Ionel, I. Ionel, A. Nemuc, A. Nemuc, } "Air pollution monitoring using the open path technique", Proc. SPIE 6745, Remote Sensing of Clouds and the Atmosphere XII, 674520 (17 October 2007); doi: 10.1117/12.737930; https://doi.org/10.1117/12.737930

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