A global estimate of the water-mass transformation by internal wave-driven mixing in the deep ocean is presented. The estimate is based on the energy conversion from tidal and geostrophic motions into internal waves combined with a turbulent mixing parameterization. We show that internal wave-driven mixing in the deep ocean can sustain 20–30 Sv of water-mass transformation. One third or more of this transformation is attributed to lee waves generated by geostrophic motions flowing over rough topography, primarily in the Southern Ocean. While these results are uncertain due to many assumptions, poorly constrained parameters and data noise that enter in the calculation, the result that lee wave-driven mixing plays an important role in the abyssal ocean circulation is likely robust. The implication is that lee wave-driven mixing should be represented in ocean and climate models, but currently it is not. Citation: Nikurashin, M., and R. Ferrari (2013), Overturning circulation driven by breaking internal waves in the deep ocean, Geophys. Res. Lett., 40, doi:10.1002/grl.50542.

Item Type:	Refereed Article
Research Division:	Earth Sciences
Research Group:	Oceanography
Research Field:	Physical oceanography
Objective Division:	Environmental Management
Objective Group:	Marine systems and management
Objective Field:	Oceanic processes (excl. in the Antarctic and Southern Ocean)
UTAS Author:	Nikurashin, M (Dr Maxim Nikurashin)
ID Code:	86207
Year Published:	2013
Web of Science® Times Cited:	82
Deposited By:	IMAS Research and Education Centre
Deposited On:	2013-08-28
Last Modified:	2017-11-01
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