Combined effects of QBO and 11-year solar cycle on the winter hemisphere in a stratosphere-troposphere coupled system
Article first published online: 3 JUN 2009
Copyright 2009 by the American Geophysical Union.
Geophysical Research Letters
Volume 36, Issue 11, June 2009
How to Cite
2009), Combined effects of QBO and 11-year solar cycle on the winter hemisphere in a stratosphere-troposphere coupled system, Geophys. Res. Lett., 36, L11804, doi:10.1029/2008GL037117., , and (
- Issue published online: 3 JUN 2009
- Article first published online: 3 JUN 2009
- Manuscript Accepted: 5 MAY 2009
- Manuscript Revised: 14 APR 2009
- Manuscript Received: 23 DEC 2008
- Quasi-Biennial Oscillation;
- 11-year solar cycle;
- stratospheric sudden warming
 Combined effects of the quasi-biennial oscillation (QBO) and the 11-year solar cycle (SC) on the winter hemisphere are investigated with an idealized mechanistic circulation model of a stratosphere-troposphere coupled system. A zonal momentum forcing is imposed to mimic a westerly or easterly phase of the QBO and a heating anomaly associated with the SC is introduced around the stratopause. A series of long time integrations of 39,600 days are performed to obtain statistically significant results for forty-six combinations of these experimental parameters. The obtained dependence of the temperature response in the polar stratosphere on the combination of QBO and SC are qualitatively consistent with the observed responses. The difference in the winter polar stratosphere between the solar maximum and minimum phase is highly significant at above the 95% confidence level in many cases of the QBO westerly runs. The SC effect is, however, relatively small compared to the QBO effect.