Interdecadal change in the Antarctic Circumpolar Wave during 1951–2010 |
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| Authors: | Lingen Bian Xiang Lin |
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| Institution: | State Key Laboratory of Weather Disaster, Chinese Academy of Meteorological Sciences, Beijing 100081;State Key Laboratory of Weather Disaster, Chinese Academy of Meteorological Sciences, Beijing 100081 |
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| Abstract: | 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 Southern 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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| Keywords: | Antarctic circumploar wave variability interdecadal change subperiods |
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