Winter 2009–2010: A case study of an extreme Arctic Oscillation event
Article first published online: 11 SEP 2010
Copyright 2010 by the American Geophysical Union.
Geophysical Research Letters
Volume 37, Issue 17, September 2010
How to Cite
2010), Winter 2009–2010: A case study of an extreme Arctic Oscillation event, Geophys. Res. Lett., 37, L17707, doi:10.1029/2010GL044256., , , , and (
- Issue published online: 11 SEP 2010
- Article first published online: 11 SEP 2010
- Manuscript Accepted: 5 AUG 2010
- Manuscript Revised: 27 JUL 2010
- Manuscript Received: 8 JUN 2010
- climate dynamics;
- seasonal prediction;
- Arctic Oscillation
 Winter 2009–2010 made headlines for extreme cold and snow in most of the major population centers of the industrialized countries of the Northern Hemisphere (NH). The major teleconnection patterns of the Northern Hemisphere, El Niño/Southern Oscillation (ENSO) and the Arctic Oscillation (AO) were of moderate to strong amplitude, making both potentially key players during the winter of 2009–2010. The dominant NH winter circulation pattern can be shown to have originated with a two-way stratosphere-troposphere interaction forced by Eurasian land surface and lower tropospheric atmospheric conditions during autumn. This cycle occurred twice in relatively quick succession contributing to the record low values of the AO observed. Using a skillful winter temperature forecast, it is shown that the AO explained a greater variance of the observed temperature pattern across the extratropical landmasses of the NH than did ENSO.