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www.atmos-meas-tech-discuss.net/4/1677/2011/
doi:10.5194/amtd-4-1677-2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.
Comparison of HDO measurements from Envisat/MIPAS with observations by Odin/SMR and SCISAT/ACE-FTS
1Karlsruhe Institute of Technology, Institute for Meteorology and Climate Research, Hermann-von-Helmholtz-Platz 1, 76344 Leopoldshafen, Germany
2Utrecht University, Institute for Marine and Atmospheric Research Utrecht, Princetonplein 5, 3584 CC Utrecht, The Netherlands
3Chalmers University of Technology, Department of Earth and Space Science, Hörsalsvägen 11, 41296 Göteborg, Sweden
4National Institute of Information and Communications Technology (NICT), Applied Electromagnetic Research Center, 4-2-1 Nukui-kita, Koganei, Tokyo 184-8795, Japan
5University of Waterloo, Department of Chemistry, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
6University of Toronto, Department of Physics, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada
7University of York, Department of Chemistry, Heslington, York, YO10 5DD, UK
Abstract. Measurements of thermal emission in the mid-infrared by Envisat/MIPAS allow the retrieval of HDO information roughly in the altitude range between 10 km and 50 km. From September 2002 to March 2004 MIPAS performed measurements in the full spectral mode. To assess the quality of the HDO data set obtained during that period comparisons with measurements by Odin/SMR and SCISAT/ACE-FTS were performed. Comparisons were made on profile-to-profile basis as well as using seasonal and monthly means. All in all the comparisons yield favourable results. The largest deviations between MIPAS and ACE-FTS are observed below 15 km, where relative deviations can occasionally exceed 100%. Despite that the latitudinal structures observed by both instruments fit. Between 15 km and 20 km there is less consistency, especially in the Antarctic during winter and spring. Above 20 km there is a high consistency in the structures observed by all three instruments. MIPAS and ACE-FTS typically agree within 10%, with MIPAS mostly showing higher abundances than ACE-FTS. Both data sets show considerably more HDO than SMR. This bias can mostly be explained by uncertainties in spectroscopic parameters. Above 40 km, where the MIPAS HDO retrieval reaches its limits, still good agreement with the structures observed by SMR is found for most seasons. This puts some confidence in the MIPAS data at these altitudes.
Discussion Paper (PDF, 938 KB) Interactive Discussion (Closed, 8 Comments) Final Revised Paper (AMT)
Notice on Discussion StatusCitation: Lossow, S., Steinwagner, J., Urban, J., Dupuy, E., Boone, C. D., Kellmann, S., Linden, A., Kiefer, M., Grabowski, U., Höpfner, M., Glatthor, N., Röckmann, T., Murtagh, D. P., Walker, K. A., Bernath, P. F., von Clarmann, T., and Stiller, G. P.: Comparison of HDO measurements from Envisat/MIPAS with observations by Odin/SMR and SCISAT/ACE-FTS, Atmos. Meas. Tech. Discuss., 4, 1677-1721, doi:10.5194/amtd-4-1677-2011, 2011. Bibtex EndNote Reference Manager XML
