Line shape of the far-wing beyond the band head of the CO(2) v(3) band

作者：Tanaka Tomoaki^*; Fukabori Masashi; Sugita Takafumi; Yokota Tatsuya; Kumazawa Ryoichi; Watanabe Takeshi; Nakajima Hideaki

来源：Journal of Molecular Spectroscopy, 2008, 252(2): 185-189.

DOI：10.1016/j.jms.2008.08.004

• CO(2)
• Far-wing
• Line-mixing
• chi-factor

Carbon dioxide is one of the most important trace gases in the terrestrial atmosphere. The spectral data required in remote sensing are the spectral parameter of each absorption line and a line shape model. This paper describes the absorption properties Of CO(2) near 2400 cm(-1); these properties are of interest to those in the atmospheric temperature sounding field. The shape of the far-wing of N(2)- and O(2)-broadened CO(2) lines was investigated in the 2200-2500 cm(-1) spectral region in a temperature range of atmospheric interest (230-318 K). We focused on the higher rotational quantum number of the R-branch in the v(3) band, where the effect of the far-wing is enhanced. The effect of the far-wing has been studied extensively by others, since the CO(2) v(3) band is known to exhibit sub-Lorentzian behavior. Here, we show the observed spectra along with calculated spectra for five temperatures. We used first-order line-mixing and the chi-factor, which accounts for the effect of the far-wing, to create the calculated spectra.

• 出版日期2008-12
• 单位中国气象科学研究院