Measurements of 12C16O2 line parameters in the 8790-8860, 9340-9650 and 11,430-11,505 cm−1 wavenumber regions by means of Fourier transform spectroscopy

- Line intensities of eight CO2 bands in the 1.13, 1.06 and 0.87 µm regions are measured.
- Disagreement between measured line intensities and those from the databases is found.
- Global modeling of the line intensities in the studied regions is performed.

Absorption spectra of carbon dioxide, 12C16O2, have been studied in the three wavenumber ranges (8790-8860, 9340-9650 and 11,430-11,505 cm−1) of the near infrared region using spectrophotometric complex of V.E. Zuev Institute of Atmospheric Optics based on an Bruker IFS 125 HR and a 30 m multipass cell with the White type optical system. The spectra were recorded at spectral resolution of 0.015 cm−1, path length of 613.82 m and at pressure range from 209 to 400 mbar. The multispectrum fittings with the Voigt profile were performed to retrieve the line positions and intensities of eight bands 5001r−00001 (r=3, 4), 2003r−00001 (r=1,2,3) 2113r−01101 (r=1,2) and 00051−00001. The uncertainty of the line position determination is estimated to be about 0.001 cm−1. The absolute accuracy of the line intensity measurement is 5% for 5001r−00001 (r=3,4) bands, 3% for 2003r−00001 (r=1,2,3) bands, 10% for 00051−00001 band and 15% for 2113r−01101 (r=1,2) bands. The measured line intensities were used to fit the effective dipole moment parameters of 12C16O2. The fitted parameters reproduce the measured line intensities within their experimental uncertainties. A comparison of measured positions and intensities with those contained in HITRAN, CDSD, AMES-296, and High-T databases is presented and discussed.