Articles | Volume 6, issue 7
https://doi.org/10.5194/acp-6-1835-2006
https://doi.org/10.5194/acp-6-1835-2006
29 May 2006
29 May 2006

Large decadal scale changes of polar ozone suggest solar influence

B.-M. Sinnhuber, P. von der Gathen, M. Sinnhuber, M. Rex, G. König-Langlo, and S. J. Oltmans

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.

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