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dc.contributor.authorFine, Elizabeth C.  Concept link
dc.contributor.authorAlford, Matthew H.  Concept link
dc.contributor.authorMacKinnon, Jennifer A.  Concept link
dc.contributor.authorMickett, John B.  Concept link
dc.date.accessioned2021-07-15T19:23:35Z
dc.date.available2021-07-15T19:23:35Z
dc.date.issued2020-12-22
dc.identifier.citationFine, E. C., Alford, M. H., MacKinnon, J. A., & Mickett, J. B. (2021). Microstructure mixing observations and finescale parameterizations in the Beaufort Sea. Journal of Physical Oceanography, 51(1), 19-35.en_US
dc.identifier.urihttps://hdl.handle.net/1912/27360
dc.descriptionAuthor Posting. © American Meteorological Society, 2021. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 51(1), (2021): 19-35, https://doi.org/10.1175/JPO-D-19-0233.1.en_US
dc.description.abstractIn the Beaufort Sea in September of 2015, concurrent mooring and microstructure observations were used to assess dissipation rates in the vicinity of 72°35′N, 145°1′W. Microstructure measurements from a free-falling profiler survey showed very low [O(10−10) W kg−1] turbulent kinetic energy dissipation rates ε. A finescale parameterization based on both shear and strain measurements was applied to estimate the ratio of shear to strain Rω and ε at the mooring location, and a strain-based parameterization was applied to the microstructure survey (which occurred approximately 100 km away from the mooring site) for direct comparison with microstructure results. The finescale parameterization worked well, with discrepancies ranging from a factor of 1–2.5 depending on depth. The largest discrepancies occurred at depths with high shear. Mean Rω was 17, and Rω showed high variability with values ranging from 3 to 50 over 8 days. Observed ε was slightly elevated (factor of 2–3 compared with a later survey of 11 profiles taken over 3 h) from 25 to 125 m following a wind event which occurred at the beginning of the mooring deployment, reaching a maximum of ε= 6 × 10−10 W kg−1 at 30-m depth. Velocity signals associated with near-inertial waves (NIWs) were observed at depths greater than 200 m, where the Atlantic Water mass represents a reservoir of oceanic heat. However, no evidence of elevated ε or heat fluxes was observed in association with NIWs at these depths in either the microstructure survey or the finescale parameterization estimates.en_US
dc.description.sponsorshipThis work was supported by NSF Grants PLR 14-56705 and PLR-1303791 and by NSF Graduate Research Fellowship Grant DGE-1650112.en_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.urihttps://doi.org/10.1175/JPO-D-19-0233.1
dc.subjectOceanen_US
dc.subjectArcticen_US
dc.subjectInternal wavesen_US
dc.subjectTurbulenceen_US
dc.subjectDiapycnal mixingen_US
dc.titleMicrostructure mixing observations and finescale parameterizations in the Beaufort Seaen_US
dc.typeArticleen_US
dc.identifier.doi10.1175/JPO-D-19-0233.1


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