The GEISA 2011 sub-database on line transition parameters

The GEISA 2011 sub-database of line transition parameters involves 50 molecules (111 isotopic species) and contains 3,794,426 entries, in the spectral range from 10^-6 to 35,877 cm^-1.This represents an increase of: 8 molecular species, 14 isotopic species and 2,139,626 entries since the GEISA-2003 edition. The newly archived molecular species are: CH₃Br, CH₃OH, NO+, HNC, C₆H₆, C₂HD, CF₄, CH₃CN.

The included molecules are constituents of the atmospheres of Earth (major permanent and trace molecules) and of other Planets (such as: C₂H₄, GeH₄, C₃H₈, C₂N₂, C₄H₂, HC₃N, H₂S, HCOOH and C₃H₄, for the Giant Planets). Among the 31 spectroscopic parameters archived in GEISA, the most important for atmospheric radiative transfer modelling are: the wavenumber (cm^-1) of the line associated with a vibro-rotational transition, the intensity of the line (cm molecule^-1 at 296K), the Lorentzian collision halfwidth (cm^-1 atm^-1 at 296 K), with associated self – pressure broadening parameter, the energy of the lower level of the transition (cm^-1), the transition quantum identifications for the lower and upper levels of the transition, the temperature dependence coefficient of the halfwidth, the database management identification codes for isotopologues and for molecules.

• Overall description of available vibrational transitions
• Reference update

The interactive access to the database is available here.