Large decadal scale changes of polar ozone suggest solar influence
1Institute of Environmental Physics, University of Bremen, Bremen, Germany
2Alfred-Wegener-Institute for Polar and Marine Research, Research Unit Potsdam, Potsdam, Germany
3Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven, Germany
4NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA
Abstract. Long-term measurements of polar ozone show an unexpectedly large decadal scale variability in the mid-stratosphere during winter. Negative ozone anomalies are strongly correlated with the flux of energetic electrons in the radiation belt, which is modulated by the 11-year solar cycle. The magnitude of the observed decadal ozone changes (≈20%) is much larger than any previously reported solar cycle effect in the atmosphere up to this altitude. The early-winter ozone anomalies subsequently propagate downward into the lower stratosphere and may even influence total ozone and meteorological conditions during spring. These findings suggest a previously unrecognized mechanism by which solar variability impacts on climate through changes in polar ozone.
Sinnhuber, B.-M., von der Gathen, P., Sinnhuber, M., Rex, M., König-Langlo, G., and Oltmans, S. J.: Large decadal scale changes of polar ozone suggest solar influence, Atmos. Chem. Phys., 6, 1835-1841, doi:10.5194/acp-6-1835-2006, 2006.