dc.contributor.author | Bates, Michael | |
dc.contributor.author | Tulloch, Ross | |
dc.contributor.author | Marshall, John | |
dc.contributor.author | Ferrari, Raffaele | |
dc.date.accessioned | 2017-05-03T16:17:11Z | |
dc.date.available | 2017-05-03T16:17:11Z | |
dc.date.issued | 2014 | |
dc.identifier.issn | 0022-3670 | |
dc.identifier.doi | 10.1175/JPO-D-13-0130.1 | |
dc.identifier.uri | http://hdl.handle.net/10072/66780 | |
dc.description.abstract | Observations and theory suggest that lateral mixing by mesoscale ocean eddies only reaches its maximum potential at steering levels, surfaces at which the propagation speed of eddies approaches that of the mean flow. Away from steering levels, mixing is strongly suppressed because the mixing length is smaller than the eddy scale, thus reducing the mixing rates. The suppression is particularly pronounced in strong currents where mesoscale eddies are most energetic. Here, a framework for parameterizing eddy mixing is explored that attempts to capture this suppression. An expression of the surface eddy diffusivity proposed by Ferrari and Nikurashin is evaluated using observations of eddy kinetic energy, eddy scale, and eddy propagation speed. The resulting global maps of eddy diffusivity have a broad correspondence with recent estimates of diffusivity based on the rate at which tracer contours are stretched by altimetric-derived surface currents. Finally, the expression for the eddy diffusivity is extrapolated in the vertical to infer the eddy-induced meridional heat transport and the overturning streamfunction. | |
dc.description.peerreviewed | Yes | |
dc.description.publicationstatus | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | American Meteorological Society | |
dc.publisher.place | United States | |
dc.relation.ispartofstudentpublication | N | |
dc.relation.ispartofpagefrom | 1523 | |
dc.relation.ispartofpageto | 1540 | |
dc.relation.ispartofissue | 6 | |
dc.relation.ispartofjournal | Journal of Physical Oceanography | |
dc.relation.ispartofvolume | 44 | |
dc.rights.retention | Y | |
dc.subject.fieldofresearch | Oceanography | |
dc.subject.fieldofresearch | Physical oceanography | |
dc.subject.fieldofresearch | Maritime engineering | |
dc.subject.fieldofresearchcode | 3708 | |
dc.subject.fieldofresearchcode | 370803 | |
dc.subject.fieldofresearchcode | 4015 | |
dc.title | Rationalizing the Spatial Distribution of Mesoscale Eddy Diffusivity in Terms of Mixing Length Theory | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
gro.faculty | Griffith Sciences, Griffith School of Environment | |
gro.rights.copyright | Self-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the authors for more information. | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Bates, Michael | |