2019 Articles
The CO2 –broadened H2O continuum in the 100–1500 cm -1 region: Measurements, predictions and empirical model
Transmission spectra of H2O + CO2 mixtures have been recorded, at 296, 325 and 366 K, for various pres- sures and mixture compositions using two experimental setups. Their analysis enables to retrieve values of the “continuum”absorption by the CO2 -broadened H2O line wings between 100 and 1500 cm-1 . The results are in good agreement with those, around 1300 cm-1 , of the single previous experimental study available. Comparisons are also made with direct predictions based on line-shape correction factors χ calculated, almost thirty years ago, using a quasistatic approach and an input H2O –CO2 intermolecular potential. They show that this model quite nicely predicts, with slightly overestimated values, the con- tinuum over a spectral range where it varies by more than three orders of magnitude. An empirical cor- rection is proposed, based on the experimental data, which should be useful for radiative transfer and climate studies in CO2 rich planetary atmospheres.
Subjects
Files
- JQSRT-230-75-2019.pdf application/pdf 254 KB Download File
Also Published In
- Title
- Journal of Quantitative Spectroscopy & Radiative Transfer
- DOI
- https://doi.org/10.1016/j.jqsrt.2019.03.016
More About This Work
- Academic Units
- Applied Physics and Applied Mathematics
- Published Here
- April 15, 2019