High-Accuracy CO2 Line Intensities Determined from Theory and Experiment

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Abstract

Atmospheric CO$_2$ concentrations are being closely monitored by remote sensing experiments which rely on knowing line intensities with an uncertainty of 0.5\%\ or better. Most available laboratory measurements have uncertainties much larger than this. We report a joint experimental and theoretical study providing rotation-vibration line intensities with the required accuracy. The {\it ab initio} calculations are extendible to all atmospherically important bands of CO$_2$ and to its isotologues. As such they will form the basis for detailed CO$_2$ spectroscopic line lists for future studies.

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Polyansky, O. L., Bielska, K., Ghysels, M., Lodi, L., Zobov, N. F., Hodges, J. T., & Tennyson, J. (2015). High-Accuracy CO2 Line Intensities Determined from Theory and Experiment. Physical Review Letters, 114(24). https://doi.org/10.1103/PhysRevLett.114.243001

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