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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/amt-2019-328
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-328
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 25 Sep 2019

Submitted as: research article | 25 Sep 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

A comparison of OH nightglow volume emission rates as measured by SCIAMACHY and SABER

Yajun Zhu1,2, Martin Kaufmann1,3, Qiuyu Chen1,3, Jiyao Xu2,4, Qiucheng Gong1,3, Jilin Liu1,3, Daikang Wei1,3, and Martin Riese1,3 Yajun Zhu et al.
  • 1Institute of Energy and Climate Research, Forschungszentrum Jülich, Jülich, Germany
  • 2State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China
  • 3Institute for Atmospheric and Environmental Research, University of Wuppertal, Germany
  • 4School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, China

Abstract. Hydroxyl (OH) short-wave infrared emissions measured by the SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) were used in this study to simulate OH 1.6 μm and 2.0 μm radiances as measured by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument. This paper presents a retrieval model to perform an inversion of OH(v) number densities in order to simulate OH ro-vibrational emission radiances using a non-linear regularized global fit technique. OH 1.6 μm and 2.0 μm radiances as measured by SABER were retrieved from OH limb measurements recorded by SCIAMACHY channel 6 for altitudes in the range of 80–96 km. The main source of uncertainty in the retrieval is related to the Einstein coefficients. Systematic deviations of up to 88 % were found between SABER OH 1.6 μm and 2.0 μm radiance measurements and the corresponding simulations obtained from SCIAMACHY OH data. The radiometric calibration of the instruments could potentially explain the differences between the two measurements.

Yajun Zhu et al.
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Short summary
OH airglow emissions can be used to derive rotational temperature and trace constituents in mesopause region, but systematic differences exist for the follow-up data using OH emission radiance as measured by SCIAMACHY and SABER. This paper is to make a comparison of OH emission radiance as measured by them and to show the systematic differences between the two measurements. The radiometric calibration of the two instruments could potentially explain the differences between the two measurements.
OH airglow emissions can be used to derive rotational temperature and trace constituents in...
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