Current updates of the water-vapor line list in HITRAN: A new “Diet” for air-broadened half-widths
✍ Scribed by Iouli E. Gordon; Laurence S. Rothman; Robert R. Gamache; David Jacquemart; Chris Boone; Peter F. Bernath; Mark W. Shephard; Jennifer S. Delamere; Shepard A. Clough
- Book ID
- 104028549
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 741 KB
- Volume
- 108
- Category
- Article
- ISSN
- 0022-4073
No coin nor oath required. For personal study only.
✦ Synopsis
The current edition of the HITRAN compilation employed a sophisticated algorithm for combining measurements available for the air-broadened half-widths of water-vapor absorption lines with theoretical values. Nevertheless, some of the values in the HITRAN database were found to be far from ideal, due to large dispersions that still exist in the experimental or theoretical methods. Therefore, new criteria were developed for introducing the best available airbroadened half-widths into HITRAN, based on physical principles and statistics. This update concerns the three most abundant isotopologues of water, with the values for H 2 17 O and H 2 18 O being the ones from analogous transitions of the principal isotopologues. The new parameters have been tested in different remote-sensing applications and improved constituent profiles were obtained. In total, air-broadened half-width values were updated for 11,787 transitions of water vapor in the HITRAN database (6789 for H 2 16 O, 2906 for H 2 17 O, and 2092 for H 2 18 O). Some additional updates to the water-vapor line list are also presented. The resultant file (01_hit06.par) was uploaded to the HITRAN website (http:// www.cfa.harvard.edu/hitran/) in September 2006.