【摘 要】
：
In this study,we defined an index of the Antarctic Circumploar Wave (ACW) and analyzed its variability for the period 1951 2010.A regime shift of the circumpola
【机 构】
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State Key Laboratory of Weather Disaster, Chinese Academy of Meteorological Sciences, Beijing 100081
论文部分内容阅读
In this study,we defined an index of the Antarctic Circumploar Wave (ACW) and analyzed its variability for the period 1951 2010.A regime shift of the circumpolar westerly in the South Ocean and an interdecadal change of the ACW,which occurred around the mid-1970s,were identified.Associated with these changes,the variations of the ACW show three distinct sub-periods:1951-1973,1974 1980,and 1981-2010.They are characterized by different speeds,amplitudes,and wave structures.We briefly investigated possible mechanisms responsible for the different behaviors of the ACW during the three periods.
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