Long-term air quality study by DOAS within Beijing

Klaus Schäfer; Yuesi Wang; Jinyuan Xin; Hong Ling; Peter Suppan

doi:10.1117/12.865112

11 October 2010 Long-term air quality study by DOAS within Beijing

Klaus Schäfer, Yuesi Wang, Jinyuan Xin, Hong Ling, Peter Suppan

Proceedings Volume 7827, Remote Sensing of Clouds and the Atmosphere XV; 78270I (2010) https://doi.org/10.1117/12.865112
Event: SPIE Remote Sensing, 2010, Toulouse, France

Abstract

To study the gaseous pollutants and those compounds important for secondary aerosol formation like SO2, NO, and NO2 a DOAS is operated since beginning of April 2009 in Beijing. Information about different emission sources are provided by this one instrument i.e. by path-integrated air pollution information in different directions. The DOAS from OPSIS GmbH contains an analysator (AR 500) and an emitter/receiver unit (ER 130) pointing to three retroreflectors. One retroreflector was installed at a lamp mast on the other side of the motorway (568 m path length) so that the path was about 10 m above motorway level and perpendicular across the motorway. Another retroreflector was set up for a path (126 m path length) in nearly the same direction across a normal street with shops and restaurants and the third retroreflector was used to operate a path (266 m path length) perpendicular to and away from the motorway. The emitter/receiver unit was in a distance of about 20 m to an air pollution monitoring station at the roof of that building. Furthermore, a ceilometer was used to analyse the actual development of the mixing layer height and boundary layers as well as the vertical distribution of aerosols and particles. These data are used to show the meteorological influences and the role of emissions within the context of the air quality in Beijing relevant for measures to reduce the air pollution.

Citation Download Citation

Klaus Schäfer, Yuesi Wang, Jinyuan Xin, Hong Ling, and Peter Suppan "Long-term air quality study by DOAS within Beijing", Proc. SPIE 7827, Remote Sensing of Clouds and the Atmosphere XV, 78270I (11 October 2010); https://doi.org/10.1117/12.865112

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