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https://doi.org/10.5194/amt-2017-345
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
01 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).
On the improved stability of the version 7 MIPAS ozone record
Alexandra Laeng1, Ellen Eckert1, Thomas von Clarmann1, Michael Kiefer1, Daan Hubert2, Gabriele Stiller1, Udo Grabowski1, Norbert Glatthor1, Johannes Plieninger1, Sylvia Kellmann1, Andrea Linden1, Stefan Lossow1, Arne Babenhauserheide1, Lucien Froidevaux3, and Kaley Walker4 1Institut für Meteorologie und Klimaforschung, Karlsruhe Institute of Technology, Germany
2BIRA, Belgium
3Jet Propulsion Laboratory, California Institute of Technology, USA
4University of Toronto, Canada
Abstract. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) was an IR limb emission spectrometer on the Envisat platform. From 2002 to 2012, it performed pole-to-pole measurements during day and night, producing more than 1000 profiles/day. The European Space Agency (ESA) has recently released the new version 7 of Level 1 MIPAS spectra, in which a new set of time-dependent correction coefficients for the non-linearity in the detectors’ response functions was implemeted. This change is expected to reduce the long-term drift of the MIPAS Level 2 data. We evaluate the long-term stability of ozone level 2 data retrieved from MIPAS V7 Level 1 spectra with the IMK/IAA Scientific Level 2 Processor. We compare it with ozone measurements from the Microwave Limb Sounder (MLS) instrument on NASA’s Aura satellite, ozonesondes and ground-based lidar instruments. The ozonesondes and lidars alone do not allow us to conclude with enough significance that the new version is more stable than the previous one, but a clear improvement in long-term stability is observed in the satellite-data based drift analysis. The results of ozonesondes, lidars and satellite drift analysis are consistent: all indicate that the drifts of the new version are less negative/more positive nearly everywhere above 15 km. These results indicate that MIPAS data are now even more suited for trend studies, alone or as part of a merged data record.

Citation: Laeng, A., Eckert, E., von Clarmann, T., Kiefer, M., Hubert, D., Stiller, G., Grabowski, U., Glatthor, N., Plieninger, J., Kellmann, S., Linden, A., Lossow, S., Babenhauserheide, A., Froidevaux, L., and Walker, K.: On the improved stability of the version 7 MIPAS ozone record, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-345, in review, 2017.
Alexandra Laeng et al.
Alexandra Laeng et al.
Alexandra Laeng et al.

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Short summary
MIPAS was an IR limb emission spectrometero n the Envisat platform. From 2002 to 2012, it performed pole-to-pole measurements of ozone during day and night. ESA has recently released the new version 7 of Level 1 MIPAS spectra,which is expected to reduce the long-term drift of the MIPAS Level 2 data. We evaluate the long-term stability of ozone level 2 data from KIT IMK Processor. Our results indicate that MIPAS data are now even more suited for trend studies, alone or as part of a merged data.
MIPAS was an IR limb emission spectrometero n the Envisat platform. From 2002 to 2012, it...
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