Simultaneous Retrievals of Nighttime O(<SUP>3</SUP>P) and Total OH Densities From Satellite Observations of Meinel Band Emissions - Archive ouverte HAL Access content directly
Journal Articles Geophysical Research Letters Year : 2021

Simultaneous Retrievals of Nighttime O(3P) and Total OH Densities From Satellite Observations of Meinel Band Emissions

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1
Peter A. Panka
  • Function : Author
Alexander A. Kutepov
  • Function : Author
Yajun Zhu
  • Function : Author
Martin Kaufmann
  • Function : Author
Konstantinos S. Kalogerakis
  • Function : Author
Ladislav Rezac
  • Function : Author
Daniel R. Marsh
  • Function : Author
Diego Janches
  • Function : Author

Abstract

Retrieving the total number density [OH], which is used in the chemical balance equations and is the sum of both ground and excited vibrational state populations, is a challenging problem to such a degree there exist no such estimates from recent space observations. We present a novel retrieval approach to simultaneously and self-consistently derive both [O(3P)] and total [OH] in the nighttime mesosphere and lower thermosphere which operates with the Meinel band volume emission rates and their ratios. Its application to the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) and Scanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) observations shows a good agreement of the retrieved [O(3P)] taking into account the measurement uncertainties and variation of model inputs used. However, retrieved [OH] show a large discrepancy, mainly above 90 km. SCIAMACHY [OH] is generally in good agreement with WACCM [OH] after accounting for uncertainties, while SABER OH is larger than WACCM [OH] by up to a factor of 2.
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insu-03726962 , version 1 (19-08-2022)

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Peter A. Panka, Alexander A. Kutepov, Yajun Zhu, Martin Kaufmann, Konstantinos S. Kalogerakis, et al.. Simultaneous Retrievals of Nighttime O(3P) and Total OH Densities From Satellite Observations of Meinel Band Emissions. Geophysical Research Letters, 2021, 48, ⟨10.1029/2020GL091053⟩. ⟨insu-03726962⟩
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