Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3524701o&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 24, CiteID L24701
Physics
14
Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Climatology (1616, 1620, 3305, 4215, 8408), Global Change: Climate Dynamics (0429, 3309), Hydrology: Snow And Ice (0736, 0738, 0776, 1827), Atmospheric Processes: Polar Meteorology
Scientific paper
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.
McPhee Miles G.
Ogi Masayo
Rigor Ignatius G.
Wallace John M.
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