File:Greenhouse Gas Absorption Coefficients.svg
Results are for sea-level atmospheric pressure, a water vapor concentration of 0.25%, and a CO2 concentration of 420 ppm, an N2O concentration of 390 ppm, and a CH4 concentration of 1900 ppb. These concentrations are roughly characteristic of atmospheric average values in recent years. Ozone is present in the troposphere but most significant in the upper atmosphere, so cannot readily be compared.
Results are for sea-level pressure, but vary with altitude due to pressure broadening. Concentration of water vapor declines with altitude, increasing the relative importance of other gases at higher altitudes.
The figure was generated using calculations done by the HAPI 1.2.2.0 software package available at http://hitran.org/hapi (Reference: R.V. Kochanov, I.E. Gordon, L.S. Rothman, P. Wcislo, C. Hill, J.S. Wilzewski, "HITRAN Application Programming Interface (HAPI): A comprehensive approach to working with spectroscopic data," J. Quant. Spectrosc. Radiat. Transfer 177, 15-30 (2016) DOI: 10.1016/j.jqsrt.2016.03.005), using spectroscopic data from the HITRAN database.