Abstract：A new monitoring method of NO2 concentration near ground with the target difference absorption spectrum technology (Target DOAS) is introduced in the present paper. This method is based on the passive difference absorption spectrum technology. The instrument collects solar reflection spectrum of remote objectives, such as wall of building and mountain, and a specific reference spectrum is chosen to subtract the influence of trace gases from the target to atmospheric top, then integrated concentration of NO2 along the path between the target and instrument can be calculated through the differential absorption spectra inversion algorithm. Since the distance between the instrument and target is given, the mean concentration of NO2 can be derived. With developed Target DOAS instrument, NO2 concentration measurement was carried out in Hefei. And comparison was made between the target DOAS and long path difference absorption spectrometer. Good consistency was presented, proving the feasibility of this method.
刘 进，司福祺*，周海金，赵敏杰，窦 科，刘文清 . 目标差分吸收光谱技术测量大气NO2平均浓度的方法研究 [J]. 光谱学与光谱分析, 2013, 33(04): 895-898.
LIU Jin, SI Fu-qi*, ZHOU Hai-jin, ZHAO Min-jie, DOU Ke, LIU Wen-qing . Research on the NO2 Mean Concentration Measurement with Target Differential Optical Absorption Spectroscopy Technology. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(04): 895-898.
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