Editing Antarctic Circumpolar Wave (section)

{{short description|Coupled ocean/atmosphere wave that circles the Southern Ocean eastward in approximately eight years}}
The '''Antarctic Circumpolar Wave''' ('''ACW''') is a coupled [[ocean]]/[[Earth's atmosphere|atmosphere]] [[wave]] that circles the [[Southern Ocean]] in approximately eight years at {{Convert|6|-|8|cm/s|abbr=on}}.<ref>{{Harvnb|White|Peterson|1996}}</ref> Since it is a wave-2 phenomenon (there are two [[ridge (meteorology)|ridges]] and two [[trough (meteorology)|troughs]] in a [[Circle of latitude|latitude circle]]) at each fixed point in space a signal with a [[simple harmonic motion|period]] of four years is seen.<ref>{{Harvnb|Connolley|2002|loc=[14]}}</ref> The wave moves eastward with the [[Ocean current|prevailing currents]].