Observations of SO22 by mobile DOAS in the Guangzhou eastern area during the Asian Games 2010

[摘要] Mobile passive differential optical absorption spectroscopy measurements ofSO₂ and NO₂ were performed in the Guangzhou eastern area (GEA)during the Guangzhou Asian Games 2010 from November 2010 to December 2010.The observations were carried out between 10:00 to 13:00 (local time, i.e.,during daylight). Spatial and temporal distributions of SO₂ andNO₂ in this area were obtained and emission sources were determinedusing wind field data. The NO₂ vertical column densities were found toagree with Ozone Monitoring Instrument values. The correlation coefficient (referred to as R²)was 0.88 after cloud filtering within a specific ground pixel. During theGuangzhou Asian Games and Asian Paralympics (Para) Games, the SO₂ andNO_x emissions in the area were quantified using averaged wind speed andwind direction. For times outside the games the average SO₂ emissionwas estimated to be 9.50 ± 0.90 tons per hour and the average NO_xemission was estimated to be 5.87 ± 3.46 tons per hour. During thephases of the Asian and Asian Para Games, the SO₂ and NO_xemissions were reduced by 53.50% and 43.50%, respectively, compared tothe usual condition. We also investigated the influence of GEA on GuangzhouUniversity Town, the main venue located northwest of the GEA, and found thatSO₂ concentrations here were about tripled by emissions from the GEA.

[学科分类] 几何与拓扑