Atmos. Chem. Phys. Discuss., 7, 4427-4480, 2007
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Bias determination and precision validation of ozone profiles from MIPAS-Envisat retrieved with the IMK-IAA processor
T. Steck1, T. von Clarmann1, H. Fischer1, B. Funke2, N. Glatthor1, U. Grabowski1, M. Höpfner1, S. Kellmann1, M. Kiefer1, A. Linden1, M. Milz1, G. P. Stiller1, D. Y. Wang3, M. Allaart4, Th. Blumenstock1, P. van der Gathen5, G. Hansen6, F. Hase1, G. Hochschild1, G. Kopp1, E. Kyrö7, H. Oelhaf1, U. Raffalski8, A. Redondas Marrero9, E. Remsberg10, J. Russell III.11, K. Stebel6, W. Steinbrecht12, G. Wetzel1, M. Yela13, and G. Zhang1
1Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Germany
2Instituto de Astrofísica de Andalucía, Granada, Spain
3Physics Department, University of New Brunswick, Canada
4KNMI (Royal Netherlands Meteorological Institute), De Bilt, The Netherlands
5Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
6Norwegian Institute for Air Research (NILU), Polar Environmental Centre,Tromsø, Norway
7FMI-Arctic Research Centre, Sodankylä, Finland
8Swedish Institute of Space Physics (IRF), Kiruna, Sweden
9Instituto Nacional de Meteorologia (INM), Santa Cruz de Tenerife, Spain
10Atmospheric Sciences Competency, NASA Langley Research Center, Hampton, USA
11Department of Physics, Hampton University, Hampton, USA
12Deutscher Wetterdienst (DWD), Hohenpeißenberg, Germany
13Instituto Nacional de Técnica Aeroespacial (INTA), Torrejón de Ardoz, Spain

Abstract. This paper characterizes vertical ozone profiles retrieved with the IMK-IAA (Institute for Meteorology and Climate Research, Karlsruhe – Instituto de Astrofisica de Andalucia) science-oriented processor from spectra measured by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) aboard the environmental satellite Envisat. Bias determination and precision validation is performed on the basis of correlative measurements by ground-based lidars, Fourier transform infrared spectrometers, and microwave radiometers as well as balloon-borne ozonesondes, the balloon-borne version of MIPAS, and two satellite instruments (Halogen Occultation Experiment and Polar Ozone and Aerosol Measurement III). Percentage mean differences between MIPAS and the comparison instruments for stratospheric ozone are within ±10%. The precision in this altitude region is estimated at values between 5 and 10% which gives an accuracy of 15 to 20%. Below 18 km, the spread of the percentage mean differences is larger and the precision increases to values of more than 20% depending on altitude and latitude. The main reason for the degraded precision at low altitudes is attributed to undetected thin clouds which affect MIPAS retrievals, and to the influence of uncertainties in the water vapor concentration.

Citation: Steck, T., von Clarmann, T., Fischer, H., Funke, B., Glatthor, N., Grabowski, U., Höpfner, M., Kellmann, S., Kiefer, M., Linden, A., Milz, M., Stiller, G. P., Wang, D. Y., Allaart, M., Blumenstock, Th., van der Gathen, P., Hansen, G., Hase, F., Hochschild, G., Kopp, G., Kyrö, E., Oelhaf, H., Raffalski, U., Redondas Marrero, A., Remsberg, E., Russell III., J., Stebel, K., Steinbrecht, W., Wetzel, G., Yela, M., and Zhang, G.: Bias determination and precision validation of ozone profiles from MIPAS-Envisat retrieved with the IMK-IAA processor, Atmos. Chem. Phys. Discuss., 7, 4427-4480, doi:10.5194/acpd-7-4427-2007, 2007.
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