1. 中国科学院安徽光学精密机械研究所，中国科学院大气成分与光学重点实验室，安徽 合肥 230031 2. 中国科学院安徽光学精密机械研究所，大气物理化学研究室，安徽 合肥 230031 3. Laboratoire de Physicochimiedel’Atmosphère, Université du Littoral Cte d’Opale, 189A, Av, Maurice Schumann, 59140 Dunkerque, France
Measurement and Application of CO2 Spectroscopic Parameters near 2.0 μm
SUN Ming-guo1, 2, MA Hong-liang1, CAO Zhen-song1*, LIU Qiang1, WANG Gui-shi1,2, CHEN Wei-dong2, 3, GAO Xiao-ming1，2*
1. Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei 230031, China 2. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China 3. Laboratoire de Physicochimiedel’Atmosphère, Université du Littoral Cte d’Opale, 189A, Av, Maurice Schumann, 59140 Dunkerque, France
Abstract：The accuracy of absorption spectral parameters is very important for the trace gas measurement based on absorption spectroscopy techniques, especially for the isotopic abundance measurement of gas molecules. For some of the applications, spectral parameters listed in HITRAN database were used to retrieve the trace gas concentration. However, these parameters have uncertainty, in order to validate spectroscopic parameters near 2.0 μm of CO2 lines, which are to be used in detecting the CO2 concentration and isotopic abundance, spectra of those lines were recorded at room temperature using a distributed feed-back (DFB) diode laser. The recorded absorption spectra were fitted to Voigt profile. Line position, intensity, self-broadening coefficient and N2-broadening coefficient were deduced from those data. The results show a good consistency in comparison with those listed in HITRAN2012 database. The discrepancy of most line intensities and self-broadening coefficients are less than 2%. The CO2 concentration and δ(13CO2)in real atmosphere inside laboratory are 440 ppm and -9‰ respectively. These results provide a reliable basis for real time and on line detecting the CO2 concentration and δ(13CO2)in the wavelength range.
Key words：Tunable diode laser absorption spectroscopy;Measurement of absorption parameters;Isotope abundance
孙明国1, 2，马宏亮1，曹振松1*，刘 强1，王贵师1，2，陈卫东2, 3，高晓明1，2* . 2 μm附近CO2谱线参数测量及应用 [J]. 光谱学与光谱分析, 2014, 34(11): 2881-2886.
SUN Ming-guo1, 2, MA Hong-liang1, CAO Zhen-song1*, LIU Qiang1, WANG Gui-shi1,2, CHEN Wei-dong2, 3, GAO Xiao-ming1，2*. Measurement and Application of CO2 Spectroscopic Parameters near 2.0 μm. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(11): 2881-2886.
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