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Coherent sea level response to the Antarctic Oscillation
Author(s) -
Aoki Shigeru
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015733
Subject(s) - tide gauge , anomaly (physics) , climatology , sea level , lag , geology , antarctic oscillation , coherence (philosophical gambling strategy) , atmospheric sciences , environmental science , oceanography , el niño southern oscillation , physics , computer network , quantum mechanics , computer science , condensed matter physics
Large‐scale sea level variations around Antarctica were studied and their relationship with atmospheric variations was investigated. Tide gauge data at five coastal stations were used. Coherent sea level variations were clearly detected for all stations on intraseasonal time scales. The coherent variations had significant negative correlations with an index of the atmospheric annular mode variation (Antarctic Oscillation). Coherence was significant for periods from 10 to 100 days with negligible time lag. The negative correlation is consistent with the mechanism that a high (low) westerly anomaly leads to a stronger (weaker) northward Ekman drift and causes divergence (convergence) around Antarctica.