Open AccessOn spectroscopic models of the O 2 A ‐band and their impact upon atmospheric retrievals
Author(s) -
Long David A.,
Hodges Joseph T.
Publication year - 2012
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2012jd017807
Subject(s) - line (geometry) , mixing (physics) , computational physics , satellite , absorption (acoustics) , collision , environmental science , mixing ratio , remote sensing , absorption spectroscopy , physics , spectral line , sensitivity (control systems) , atmospheric models , atmospheric sciences , meteorology , optics , atmosphere (unit) , geology , computer science , astronomy , mathematics , engineering , electronic engineering , geometry , computer security , quantum mechanics
Highly accurate spectroscopic models for O 2 A ‐band [ b 1 Σ g + ← X 3 Σ g − (0,0)] absorption are required in numerous satellite‐ and ground‐based remote sensing measurements of atmospheric greenhouse gases. In this study, we quantify the sensitivity of the calculated A ‐band transmission spectrum to the choice of line profile and model‐input line parameter data. The models considered include the Voigt and Galatry profiles for the individual A ‐band transitions as well as line mixing and collision‐induced absorption. In order of increasing relative importance, we show that measurement uncertainty is influenced by: available line parameter data, Dicke narrowing, line mixing, and collision‐induced absorption effects.