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.

The interactive access to the database is available here.