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Estimating suppression of eddy mixing by mean flows
Citation
Klocker, A and Ferrari, R and LaCasce, JH, Estimating suppression of eddy mixing by mean flows, Journal of Physical Oceanography, 42 pp. 1566-1576. ISSN 0022-3670 (2012) [Refereed Article]
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Copyright 2012 American Meteorological Society-http://www2.ametsoc.org/ams/index.cfm/publications/authors/journal-and-bams-authors/author-resources/copyright-information/copyright-policy/
DOI: doi:10.1175/JPO-D-11-0205.1
Abstract
Particle- and tracer-based estimates of lateral diffusivities are used to estimate the suppression of eddy mixing across strong currents. Particles and tracers are advected using a velocity field derived from sea surface
height measurements from the South Pacific, in a region west of Drake Passage. This velocity field has been used in a companion paper to show that both particle- and tracer-based estimates of eddy diffusivities are
equivalent, despite recent claims to the contrary. These estimates of eddy diffusivities are here analyzed to show 1) that the degree of suppression of mixing across the strong Antarctic Circumpolar Current is correctly
predicted by mixing length theory modified to include eddy propagation along the mean flow and 2) that the suppression can be inferred from particle trajectories by studying the structure of the autocorrelation function
of the particle velocities beyond the first zero crossing. These results are then used to discuss how to compute lateral and vertical variations in eddy diffusivities using floats and drifters in the real ocean.
Item Details
Item Type: | Refereed Article |
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Keywords: | suppression eddy mixing mean flow |
Research Division: | Earth Sciences |
Research Group: | Oceanography |
Research Field: | Physical oceanography |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Understanding climate change |
Objective Field: | Understanding climate change not elsewhere classified |
UTAS Author: | Klocker, A (Dr Andreas Klocker) |
ID Code: | 91544 |
Year Published: | 2012 |
Web of Science® Times Cited: | 67 |
Deposited By: | IMAS Research and Education Centre |
Deposited On: | 2014-05-21 |
Last Modified: | 2014-08-05 |
Downloads: | 347 View Download Statistics |
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