Infrared collision-induced and far-line absorption in dense CO2 atmospheres

✍ Scribed by R. Wordsworth; F. Forget; V. Eymet

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 582 KB
• Volume: 210
• Category: Article
• ISSN: 0019-1035
• DOI: 10.1016/j.icarus.2010.06.010

✦ Synopsis

Collision-induced absorption is of great importance to the overall radiative budget in dense CO 2 -rich atmospheres, but its representation in climate models remains uncertain, mainly due to a lack of accurate experimental and theoretical data. Here we compare several parameterisations of the effect, including a new one that makes use of previously unused measurements in the 1200-1800 cm À1 spectral range. We find that a widely used parameterisation strongly overestimates absorption in pure CO 2 atmospheres compared to later results, and propose a new approach that we believe is the most accurate possible given currently available data.