CO2 sub-Lorentzian line wings ============================= HELIOS-K supports sub-Lorentzian profiles according to the :math:`\chi` factors from Perrin and Hartmann 1998. The :math:`\chi` factors are specified in the files ``chiPH89__CO2-CO2.dat`` and ``chiPH89__CO2-N2.dat``. In these files, the affected wavenumber range can be set. The ``param.dat`` file contains the option ``subLorentzianfile``, where the file name of the used :math:`\chi` factors file can be set. If a filename is set there, the sub-Lorentzian line wings are enabled. In principle, the :math:`\chi` factors can be applied also to other molecules than CO2, but this is not recommended to do. M.Y.Perrin and J.M.Hartmann, 1988 (TEMPERATURE-DEPENDENT MEASUREMENTS AND MODELING OF ABSORPTION BY CO2-N2 MIXTURES IN THE FAR LINE-WINGS OF THE 4.3 # m CO2 BAND). In :numref:`figSubLorentzian` is shown an example of the sub-Lorentzian profile for CO2. | Relevant parameters for full Voigt: - doStoreFullK = 1 - cutMode = 0 - cut = 25.0 - profile = 1 - subLorentzianfile = - | Relevant parameters for sub-Lorentzian Voigt profile in specific wavenumber band: - doStoreFullK = 1 - cutMode = 0 - cut = 25.0 - profile = 1 - subLorentzianfile = chiPH89__CO2-CO2.dat - in chiPH89__CO2-CO2.dat: - range in cm^-1 - 2100 2500 | Relevant parameters for sub-Lorentzian Voigt profile in the full wavenumber range: - doStoreFullK = 1 - cutMode = 0 - cut = 25.0 - profile = 1 - subLorentzianfile = chiPH89__CO2-CO2.dat - in chiPH89__CO2-CO2.dat: - range in cm^-1 - 0 10000 .. figure:: ../../plots/SubLorentzian/plot001.png :name: figSubLorentzian CO2 sub-Lorentzian wings with :math:`\chi` factors for Perrin and Hartmann 1998. Top panel,: :math:`\chi` factors applied to the band 2100-2600 cm^-1. Bottom panel: :math:`\chi` factors applied to the full wavenumber range. CO2, Hitran 2016, T = 250 K, P = 2 atm.