基于被动差分吸收光谱技术对大气污染物的监测研究

Atmospheric pollutants monitoring research based on the technology of passive differential optical absorption spectroscopy

被动差分吸收光谱技术是一种新兴发展的大气光学探测技术,可用于区域大气污染监测和大气成分垂直探测。基于被动差分吸收光谱分析技术,利用重庆大气超级站MAX-DOAS监测仪,于2011年5至8月对重庆主城区大气中的SO2、NO2垂直柱浓度进行了监测分析,研究得出:NO2垂直柱浓度变化趋势与当地API指数基本一致;NO2、SO2垂直柱浓度有明显日变化特征;MAX-DOAS监测结果与OMI卫星数据对比的相关系数为0.759。

Passive differential optical absorption spectroscopy was a new developed technology of atmospheric optical observation. It can be used for atmospheric monitoring of regional pollution and vertical composition. A MAX - DOAS instrument based on this technology was used for SO2 and NO2 vertical column density monitoring during May to August of 2011, on the atmospheric integrated observation super - site of Chongqing urban area. The results showed that NO2 vertical column density changing trend was almost the same with local API index. NO2 and SO2 vertical column density showed apparent diurnal changing characteristics. Then a comparison between MAX- DOAS monitoring result and OMI satellite data was made, as its correlation coefficient been 0.759.