Remote forcing of the Antarctic Circumpolar Current by diapycnal mixing

Peer Reviewed

Munday DR, Allison LC, Johnson HL, & Marshall DP

Geophysical Research Letters 38, Issue 8, pages L08609, 2011, 10.1029/2011GL046849.

We show that diapycnal mixing can drive a significant Antarctic Circumpolar Current (ACC) volume transport, even when the mixing is located remotely in northern-hemisphere ocean basins. In the case of remote forcing, the globally-averaged diapycnal mixing coefficient is the important parameter. This result is anticipated from theoretical arguments and demonstrated in a global ocean circulation model. The impact of enhanced diapycnal mixing on the ACC during glacial periods is discussed.
Keywords: Antarctic Circumpolar Current, Diapycnal mixing, Pycnocline, Teleconnections, Glacial cycles, Tidal forcing
Categories: Antarctic, Natural Science