Franzen, Christoph and Espy, Patrick Joseph and Hofmann, Niklas and Hibbins, Robert Edward and Djupvik, Anlaug Amanda (2019) Airglow Derived Measurements of Q-Branch Transition Probabilities for Several Hydroxyl Meinel Bands. ATMOSPHERE, 10 (10): 637. ISSN , 2073-4433
Full text not available from this repository. (Request a copy)Abstract
Spectroscopic measurements of the hydroxyl (OH) airglow emissions are often used to infer neutral temperatures near the mesopause. Correct Einstein coefficients for the various transitions in the OH airglow are needed to calculate accurate temperatures. However, studies showed experimentally and theoretically that the most commonly used Einstein spontaneous emission transition probabilities for the Q-branch of the OH Meinel (6,2) transition are overestimated. Extending their work to several Delta v = 2 and 3 transitions from v' = 3 to 9, we have determined Einstein coefficients for the first four Q-branch rotational lines. These have been derived from high resolution, high signal to noise spectroscopic observations of the OH airglow in the night sky from the Nordic Optical Telescope. The Q-branch Einstein coefficients calculated from these spectra show that values currently tabulated in the HITRAN database overestimate many of the Q-branch transition probabilities. The implications for atmospheric temperatures derived from OH Q-branch measurements are discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MESOSPHERIC TEMPERATURE; VARIABILITY; COEFFICIENTS; EMISSION; Hydroxyl airglow; Einstein coefficients; Meinel bands; Q-branch |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Rupert Huber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Mar 2020 09:52 |
| Last Modified: | 30 Mar 2020 09:52 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26059 |
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