A complete study of COb>2b> line parameters around 4845 cm⁻¹ for Lidar applications

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• 作者：Lilian Joly ; Fabien Gibert ; Bruno Grouiez ; Agnè ; s Grossel ; Bertr ; Parvitte ; Georges Durry ; Virginie Zé ; ninari
• 关键词：Spectroscopic parameters ; Carbon dioxide ; Diode laser spectrometer ; Lidar
• 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
• 出版年：2008
• 出版时间：February 2008
• 年：2008
• 卷：109
• 期：3
• 页码：426-434
• 全文大小：397 K

文摘

A diode laser spectrometer was used in the Groupe de Spectrométrie Moléculaire et Atmosphérique of Reims (France) to study COb>2b> line intensities, self-broadening coefficients and air-pressure-broadening coefficients near 2.063 bc;m. The spectral region ranging from 4843 to 4848 cm⁻¹, which is suitable for the measurement of atmospheric carbon dioxide (COb>2b>) mixing ratios was studied using a new generation-commercial diode laser from Nanoplus. Three lines of the (20°1)b>IIIb>←(0 0 0) band of COb>2b> have been studied. The results of intensity measurements and self-broadening coefficients are compared with previous determinations and available databases. Furthermore, the air-broadening coefficients for these transitions are also reported and analyzed. Finally, these new parameters are used for the measurement of atmospheric COb>2b> mixing ratio with the 2 bc;m heterodyne differential absorption Lidar from the Laboratoire de Météorologie Dynamique at Palaiseau (France). These new parameters demonstrate a dramatic improvement of the retrieved atmospheric COb>2b> concentrations.