Atmos. Chem. Phys. Discuss., 8, 19679-19705, 2008
www.atmos-chem-phys-discuss.net/8/19679/2008/
doi:10.5194/acpd-8-19679-2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.
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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.
Stratospheric BrONO2 observed by MIPAS
M. Höpfner1, J. Orphal2, T. von Clarmann1, G. Stiller1, and H. Fischer1
1Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Karlsruhe, Germany
2Laboratoire Interuniversitaire des Systèmes Atmosphériques, CNRS UMR 7583, Université de Paris-Est, Créteil, France

Abstract. The first measurements of stratospheric bromine nitrate (BrONO2) are reported. Bromine nitrate has been clearly identified in atmospheric infrared emission spectra recorded with the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) aboard the European Envisat satellite, and stratospheric concentration profiles have been determined for different conditions (day and night, different latitudes). The BrONO2 concentrations show strong day/night variations, with much lower concentrations during the day. Maximum volume mixing ratios observed during night are 20 to 25 pptv. The observed concentration profiles are in agreement with estimations from photochemical models and show that the current understanding of stratospheric bromine chemistry is generally correct.

Citation: Höpfner, M., Orphal, J., von Clarmann, T., Stiller, G., and Fischer, H.: Stratospheric BrONO2 observed by MIPAS, Atmos. Chem. Phys. Discuss., 8, 19679-19705, doi:10.5194/acpd-8-19679-2008, 2008.
 
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