Articles | Volume 20, issue 9
Atmos. Chem. Phys., 20, 5269–5292, 2020
https://doi.org/10.5194/acp-20-5269-2020
Atmos. Chem. Phys., 20, 5269–5292, 2020
https://doi.org/10.5194/acp-20-5269-2020

Research article 06 May 2020

Research article | 06 May 2020

OH level populations and accuracies of Einstein-A coefficients from hundreds of measured lines

Stefan Noll et al.

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Latest update: 21 Sep 2021
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Short summary
Line emission from hydroxyl (OH) molecules at altitudes of about 90 km strongly contributes to the Earth's night-sky brightness and is therefore used as an important indicator of atmospheric chemistry and dynamics. However, interpreting the measurements can be ambiguous since necessary molecular parameters and the internal state of OH are not well known. Based on high-quality spectral data, we investigated these issues and found solutions for a better understanding of the OH line intensities.
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