Summer retreat of Arctic sea ice: Role of summer winds
Article first published online: 18 DEC 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 24, December 2008
How to Cite
2008), Summer retreat of Arctic sea ice: Role of summer winds, Geophys. Res. Lett., 35, L24701, doi:10.1029/2008GL035672., , , and (
- Issue published online: 18 DEC 2008
- Article first published online: 18 DEC 2008
- Manuscript Accepted: 12 NOV 2008
- Manuscript Revised: 15 OCT 2008
- Manuscript Received: 11 AUG 2008
- Arctic sea ice extent;
- Arctic climate;
- summer in 2007
 The unprecedented retreat of first-year ice during summer 2007 was enhanced by strong poleward drift over the western Arctic induced by anomalously high sea-level pressure (SLP) over the Beaufort Sea that persisted throughout much of the summer. Comparison of the tracks of drifting buoys with monthly mean SLP charts shows a substantial Ekman drift. By means of linear regression analysis it is shown that Ekman drift during summer has played an important role in regulating annual minimum Arctic sea-ice extent in prior years as well. In combination, the preconditioning by events in prior years, as represented by an index of May multi-year ice, and current atmospheric conditions, as represented by an index of July–August–September SLP anomalies over the Arctic basin account for ∼60% of the year-to-year variance of September sea-ice extent since 1979.