Preprints
https://doi.org/10.5194/amt-2022-260
https://doi.org/10.5194/amt-2022-260
 
28 Oct 2022
28 Oct 2022
Status: this preprint is currently under review for the journal AMT.

MIPAS IMK/IAA version 8 retrieval of nitric oxide and lower thermospheric temperature

Bernd Funke1, Maya García-Comas1, Norbert Glatthor2, Udo Grabowski2, Sylvia Kellmann2, Michael Kiefer2, Andrea Linden2, Manuel López-Puertas1, Gabriele P. Stiller2, and Thomas von Clarmann2 Bernd Funke et al.
  • 1Instituto de Astrofísica de Andalucía, CSIC, Spain
  • 2Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany

Abstract. New global nitric oxide (NO) volume mixing ratio and lower thermospheric temperature data products, retrieved from Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) spectra with the IMK-IAA MIPAS data processor, have been released. The dataset covers the entire Envisat mission lifetime and includes retrieval results from all MIPAS observation modes. The data are based on ESA version 8 calibration and were processed using an improved retrieval approach compared to previous versions, specifically regarding the choice and construction of the a priori and atmospheric parameter profiles, the treatment of horizontal inhomogeneities, the treatment of the radiance offset correction, and the selection of optimized numerical settings. NO retrieval errors of individual observations are dominated by measurement noise and range from 5 % to 50 % in the stratosphere and thermosphere, and reach 40 % to 90 % in the mesosphere. Systematic errors are typically within 10–30 %. Lower thermospheric temperature errors are 5 K to 50 K with a systematic component of around 10K, the latter being dominated by non-LTE related uncertainties. NO data from different observation modes are consistent within 5–10 %. MIPAS version 8 temperatures have a better representation of the diurnal tide in the lower thermosphere compared to previous data versions. The new MIPAS temperatures are systematically warmer than results from the empirical NLRMSIS2.0 model by 30 K to 80 K in the 100–120 km region, and are colder above.

Bernd Funke et al.

Status: open (until 02 Dec 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2022-260', Chris Boone, 11 Nov 2022 reply
  • RC2: 'Comment on amt-2022-260', Anonymous Referee #1, 18 Nov 2022 reply

Bernd Funke et al.

Bernd Funke et al.

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Short summary
New global nitric oxide (NO) volume mixing ratio and lower thermospheric temperature data products, retrieved from Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) spectra with the IMK-IAA MIPAS data processor, have been released. The dataset covers the entire Envisat mission lifetime and includes retrieval results from all MIPAS observation modes. The data are based on ESA version 8 calibration and were processed using an improved retrieval approach.