MEASUREMENTS AND CALCULATIONS OF CO2 ABSORPTION AT HIGH-TEMPERATURE IN THE 4.3 AND 2.7 MU-M REGIONS

被引:23
作者
SCUTARU, D
ROSENMANN, L
TAINE, J
WATTSON, RB
ROTHMAN, LS
机构
[1] ECOLE CENT PARIS,F-92295 CHATENAY MALABRY,FRANCE
[2] VISIDYNE INC,BURLINGTON,MA 01803
[3] PHILLIPS LAB,GEOPHYS DIRECTORATE,BEDFORD,MA 01731
关键词
D O I
10.1016/0022-4073(93)90116-Y
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Absorption by pure CO2 and CO2-N2 mixtures in the 4.3 and 2.7 mum regions has been measured with a grating spectrometer with spectral resolution of 0.75 and 2 cm-1, respectively and pressures between 0.03 and 1 atm, at room temperature and around 750 K. Measurements are compared with line-by-line calculations using the spectroscopic parameters considered for the 1991 edition of the HITRAN database and those calculated by Wattson and Rothman (W-R database) with the Direct Numerical Diagonalization (DND) method. Lorentzian profiles modified by the introduction of a frequency- and temperature-dependent line shape corrective factor chi have been used. At room temperature, calculations with the two databases are consistent and in good agreement with our experiments. At 750 K, calculations with HITRAN underestimate absorption both in the 4.3 and 2.7 mum regions, whereas those with the W-R database are in good agreement with the measurements, with the latter slightly underestimating the absorption in the low frequency wing of the 4.3 mum band. This may be due to inaccuracies in the chi factors and the parameters of some hot bands.
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页码:179 / 191
页数:13
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