Tunable laser spectroscopy of CO₂ near 2.05 渭m: Atmospheric retrieval biases due to neglecting line-mixing

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• 作者：L.E. Christensen ; ^{Lance.E.Christensen@jpl.nasa.gov} ; G.D. Spiers ; R.T. Menzies ; J.C. Jacob
• 关键词：Tunable laser ; Spectroscopy ; LIDAR ; ASCENDS ; Line-mixing
• 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
• 出版年：2012
• 期刊代码：70_00224073
• 类别：ch
• 出版时间：July, 2012
• 卷：113
• 期：10
• 页码：739-748
• 文件大小：1119 K

摘要

Inclusion of line-mixing into spectroscopic models is required for precise and accurate dry-mole-fraction column CO₂ retrievals from a satellite instrument. We measure first-order line-mixing parameters of thirteen ¹²CO₂ 20⁰1₃鈫?0⁰0 CO₂ transitions near 2.05 渭m using tunable laser spectroscopy. We also report line position measurements of twelve ¹³CO₂ and ¹⁸OCO transitions in this spectral region. By incorporating line-mixing into a simple atmospheric model, we show how biases in CO₂ retrievals can be generated if line-mixing is ignored.