Preprints
https://doi.org/10.5194/essd-2021-191
https://doi.org/10.5194/essd-2021-191

  02 Jul 2021

02 Jul 2021

Review status: this preprint is currently under review for the journal ESSD.

The OH (3-1) nightglow volume emission rate retrieved from OSIRIS measurements: 2001 to 2015

Anqi Li1, Chris Z. Roth2, Adam E. Bourassa2, Douglas A. Degenstein2, Kristell Pérot1, Ole Martin Christensen1, and Donal P. Murtagh1 Anqi Li et al.
  • 1Chalmers university of technology, Department of Space, Earth and Environment, Gothenburg, Sweden
  • 2Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada

Abstract. The OH airglow has been used to investigate the chemistry and dynamics of the mesosphere and the lower thermo-sphere (MLT) for a long time. The infrared imager (IRI) aboard the Odin satellite has been recording the nighttime 1.53 μm OH (3-1) emission for more than 15 years (2001–2015) and we have recently processed the complete data set. The newly derived data products contain the volume emission rate profiles and the Gaussian approximated layer height, thickness, peak intensity and zenith intensity, and their corresponding error estimates. In this study, we describe the retrieval steps of these data products. We also provide data screening recommendations. The monthly zonal averages depict the well known annual oscillation and semi-annual oscillation signatures, which demonstrate the fidelity of the data set (https://doi.org/10.5281/zenodo.4746506, Li et al. (2021)). The uniqueness of this Odin-IRI OH long-term data set makes it valuable for studying various topics, for instance, the sudden stratospheric warming events in the polar regions and solar cycle influences on the MLT.

Anqi Li et al.

Status: open (until 27 Aug 2021)

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  • RC1: 'Comment on essd-2021-191', Anonymous Referee #1, 16 Jul 2021 reply

Anqi Li et al.

Anqi Li et al.

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Short summary
The nightglow emission originating from the vibrationally excited hydroxyl layer (about 85 km altitude) has been measured by the infrared imager (IRI) on the Odin satellite for more than 15 years. In this study, we document the retrieval steps, the resulting volume emission rates and the layer characteristics. Finally, we use the monthly zonal averages to demonstrate the fidelity of the data set. This unique, long-term data set will be valuable for studying various topics near the mesopause.