Interpretation of recent Antarctic sea ice variability
Article first published online: 22 JAN 2004
Copyright 2004 by the American Geophysical Union.
Geophysical Research Letters
Volume 31, Issue 2, January 2004
How to Cite
2004), Interpretation of recent Antarctic sea ice variability, Geophys. Res. Lett., 31, L02205, doi:10.1029/2003GL018732., , and (
- Issue published online: 22 JAN 2004
- Article first published online: 22 JAN 2004
- Manuscript Accepted: 29 DEC 2003
- Manuscript Received: 29 SEP 2003
 Trends in the satellite-derived Antarctic sea ice concentrations (1979–2002) show pronounced increase (decrease) in the central Pacific sector (Bellingshausen/western Weddell sector) by ∼4–10% per decade. Confidence levels for these regional trends exceed 95%. Positive polarities of the Antarctic Oscillation (AAO) lead to more (less) ice in the eastern Ross/Amundsen sector (Bellingshausen/northern Weddell sector), which are qualitatively opposite to the impacts of positive polarities of the El Niño-Southern Oscillation (ENSO). The mechanisms responsible for the covariability between the ice and the (a) AAO and (b) ENSO are demonstrated. Over the last 24 years, a positive AAO trend and a slightly negative ENSO trend produce a spatial pattern of ice changes similar to the regional ice trends. However, the magnitude of the ice changes associated with the AAO and ENSO is much smaller than the regional ice trends. More local (or less understood large) scale processes should be investigated for the explanations.