Tropospheric circulation sensitivity to an interactive stratospheric ozone
Article first published online: 8 MAR 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 5, March 2008
How to Cite
2008), Tropospheric circulation sensitivity to an interactive stratospheric ozone, Geophys. Res. Lett., 35, L05809, doi:10.1029/2007GL032312., , and (
- Issue published online: 8 MAR 2008
- Article first published online: 8 MAR 2008
- Manuscript Accepted: 9 JAN 2008
- Manuscript Revised: 29 NOV 2007
- Manuscript Received: 10 OCT 2007
- chemistry-dynamics coupling;
- atmospheric variability;
- coupled AOGCM
 For this conceptual study we focus on the impact of interactive stratospheric ozone chemistry on the tropospheric circulation, using the atmosphere-ocean-sea ice general circulation model (AOGCM) ECHO-GiSP with simplified stratospheric chemistry. The model covers the troposphere and middle atmosphere up to 80 km height. Our results show a clear sensitivity of the tropospheric circulation dynamics to the stratospheric chemistry. With enabled interactive stratospheric chemistry the model tends to the negative phase of the Arctic Oscillation (AO) mode. This also includes an enhanced midlatitudinal planetary and synoptic scale wave activity. The strengthening of the synoptic scale waves leads to stronger stormtracks, while the planetary scale waves show larger changes outside this particular latitudes. Another tropospheric region, which is influenced by interactive stratospheric chemistry effects, is the tropical troposphere. Due to changes in lower stratospheric ozone concentrations a significant cooling appears in the positive AO-phase compared to the negative phase.