Antarctic sea ice extent variability and its global connectivity

Abstract This study statistically evaluates the relationship between Antarctic sea ice extent and global climate variability. Temporal cross correlations between detrended Antarctic sea ice edge (SIE) anomaly and various climate indices are calculated. For the sea surface temperature (SST) in the eastern equatorial Pacific and tropical Indian Ocean, as well as the tropical Pacific precipitation, a coherent propagating pattern is clearly evident in all correlations with the spatially averaged (over 12° longitude) detrended SIE anomalies (〈SIE*〉). Correlations with ENSO indices imply that up to 34% of the variance in 〈SIE*〉 is linearly related to ENSO. The 〈SIE*〉 has even higher correlations with the tropical Pacific precipitation and SST in the tropical Indian Ocean. In addition, correlation of 〈SIE*〉 with global surface temperature produces four characteristic correlation patterns: 1) an ENSO-like pattern in the Tropics with strong correlations in the Indian Ocean and North America (r > 0.6); 2) a telecon...

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