Updates to Current HITRAN2008(v13.0) Data

Sources for HITRAN data	Update for SO2 line parameters	Update for O2 line parameters	Update for C2H6 line parameters
Update for OCS line parameters	Update for H2O line parameters

November, 2009

Update for HITRAN References

The sources for the 6 major parameters in the HITRAN database, as well as for the cross-sections data, are contained in a pdf file. This file is updated each time new or modified data are added to the compilation. The reference document can be downloaded here ( HITRAN References ) or in the HITRAN ftp site.

December, 2009

Update for SO2 (Sulfur dioxide)

Several bands of 34SO2 (second isotopologue by abundance in HITRAN) have been added in the 4 and 7.2-10 µm regions based on work published in the following papers: J.-M. Flaud, W.J. Lafferty, and R.L. Sams, "Line Intensities for the v1, v3 and v1 + v3 bands of 34SO2" JQSRT 110, 669-674 (2009); W.J. Lafferty, J.-M. Flaud, R.L. Sams, E.H. Abib Ngom, "High resolution analysis of the rotational levels of the (0 0 0), (0 1 0), (1 0 0), (0 0 1), (0 2 0), (1 1 0) and (0 1 1) vibrational states of 34SO2," J.Mol.Spectrosc. 252, 72-76 (2008); W.J. Lafferty, J.-M. Flaud, E.H.A. Ngom, and R.L. Sams, "34SO2: High-resolution analysis of the (0 3 0), (1 0 1), (1 1 1), (0 0 2) and (2 0 1) vibrational states; determination of equilibrium rotational constants for sulfur dioxide and anharmonic vibrational constants," J.Mol.Spectrosc. 253, 51-54 (2009). All the previous data that existed for 34SO2 in HITRAN2008 have been replaced.   In addition, pure-rotational transitions (with J < 100) in the ground and v2 states of 32SO2 and in the ground state of 34SO2 were adopted from the Cologne Database for Molecular Spectroscopy. The new data can be downloaded here either in ASCII:   09_hit09.par or compressed format:   09_hit09.zip These files should be used as a complete replacement of the 2008 sulfur dioxide linelist.

November, 2009

Update for O2 (Oxygen)

The band of oxygen at 1.27 µm has been updated using new intensities calculated by Prof. A. Orr-Ewing and new line-shape parameters that are explained in Washenfelder et al, "Carbon dioxide column abundances at the Wisconsin Tall Tower site," J.Geophys.Res. 111, D22305 (2006). We thank G.C. Toon of JPL for providing this line list. Two lines (at 7883.626 and 7885.778 cm-1) of the 16O18O isotopologue that were missing from previous editions of HITRAN and from the this latter list have now been added.   In addition, the intensities of the 1Delta(v=0)—3Sigma(v=1) band were scaled based on the recent results reported in Kassi et al, "Very high sensitivity CW-cavity ring down spectroscopy: Application to the a1Deltag(0)— X3Sigmag-(1) O2 band near 1.58 µm," Chem.Phys.Lett. 409, 281-287 (2005).   Finally, the intensity of the line at 7.803602 cm-1 in the pure rotational band of the isotopologue 16O18O was found to be erroneous by about a factor of 4 (we thank S. Paine of SAO for finding this error). The intensity of this line is now corrected adapting the value from the JPL catalogue. The new data can be downloaded here either in ASCII:   07_hit09.par or compressed format:   07_hit09.zip These files should be used as a complete replacement of the 2008 oxygen linelist.

September, 2009

Update for C2H6 (Ethane)

The symmetry labeling of some of the ethane lines in the official HITRAN2008 release were found to be erroneous. This situation has now been fixed. In addition, the 13C12CH6 isotopologue had not been added to the official release of HITRAN2008 despite the text in the HITRAN paper. This new isotopologue has now been included. The data can be downloaded here either in ASCII:   27_hit09.par or compressed format:   27_hit09.zip These files should be used as a complete replacement of the 2008 ethane linelist.

July, 2009

Update for OCS (Carbonyl sulfide)

It was found that due to a programming error some of the air- and self-broadening halfwidths for all isotopologues of OCS were in error by as much as 50%. It was also found in the process that there is a typo in the b3 coefficient for the O2-broadening Padé approximant given in M.A. Koshelev and M.Y. Tretyakov, "Collisional broadening and shifting of OCS rotational spectrum lines," JQSRT 110, 118-128 (2009). This b3 coefficient needs to be divided by 10. These mistakes have now been fixed, yielding much improved broadening parameters. We thank Maxim Koshelev from the Institute of Applied Physics (Nizhny Novgorod, Russia) for pointing out these errors. While performing this correction, the line positions and intensities in the pure rotational band for all of the HITRAN OCS isotopologues were updated using parameters from the Cologne Database for Molecular Spectroscopy (CDMS). The intensities were converted using the procedure described in the appendix of the HITRAN2008 paper, which includes scaling of the partition functions. The data can be downloaded here either in ASCII:   19_hit09.par or compressed format:   19_hit09.zip These files should be used as a complete replacement of the 2008 carbonyl sulfide linelist.

June, 2009

Update for H2O (Water vapor)

An error was discovered in the transcription of the intensities of HDO line parameters above 11500 cm-1. They were a factor of 10 too large in the 2008 release of HITRAN, and have now been corrected here. Thanks to B.A. Voronin of the Institute of Atmospheric Optics, Tomsk Russia, for pointing this error out to us. The data can be downloaded here either in ASCII:   01_hit09.par or compressed format:   01_hit09.zip These files should be used as a complete replacement of the 2008 water vapor linelist.