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Climatology of stratospheric bromine nitrate (BrONO2) by MIPAS

Michael Hoepfner(1), Johannes Orphal(2), Stiller Gabriele(1) and Thomas Clarmann(1)

(1) Karlsruhe Institute of Technology, Postfach 3640, 76021 Karlsruhe, Germany
(2) Universite de Paris-Est, 61 avenue du Général de Gaulle, 94010 Créteil Cedex, France


Bromine nitrate (BrONO2) in the stratosphere has been observed for the first time ever through mid-infrared high-resolution spectra measured by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) aboard the European Envisat satellite. Altitude profiles of BrONO2 volume mixing ratios have been determined globally for day and nighttime conditions confirming the predicted diurnal variation. Comparisons with photochemical equilibrium model calculations show in general a good agreement. Here we will discuss first results of a BrONO2 climatology combining both major MIPAS measurements periods of 2002-2004 and 2005-2009.


Workshop presentation