dc.contributor.author | Fer, Ilker | eng |
dc.contributor.author | Peterson, Algot Kristoffer | eng |
dc.contributor.author | Ullgren, Jenny | eng |
dc.date.accessioned | 2014-12-19T13:31:14Z | |
dc.date.available | 2014-12-19T13:31:14Z | |
dc.date.issued | 2014-05 | eng |
dc.identifier.issn | 0739-0572 | en_US |
dc.identifier.issn | 1520-0426 | en_US |
dc.identifier.uri | https://hdl.handle.net/1956/8995 | |
dc.description.abstract | Measurements of ocean microstructure are made in the turbulent Faroe Bank Channel overflow using a turbulence instrument attached to an underwater glider. Dissipation rate of turbulent kinetic energy « is measured using airfoil shear probes.Acomparison is made between 152 profiles from dive and climb cycles of the glider during a 1-week mission in June 2012 and 90 profiles collected from the ship using a vertical microstructure profiler (VMP). Approximately one-half of the profiles are collocated. For 96% of the dataset, measurements are of high quality with no systematic differences between dives and climbs. The noise level is less than 5 x 10-¹¹ W kg-¹, comparable to the best microstructure profilers. The shear probe data are contaminated and unreliable at the turning depth of the glider and for U/ut < 20, where U is the flow past the sensor, ut =(ε/N)¹/² is an estimate of the turbulent velocity scale, and N is the buoyancy frequency. Averaged profiles of ε from the VMP and the glider agree to better than a factor of 2 in the turbulent bottom layer of the overflow plume, and beneath the stratified and sheared plume–ambient interface. The glider average values are approximately a factor of 3 and 9 times larger than the VMP values in the layers defined by the isotherms 3°–6° and 6°–9°C, respectively, corresponding to the upper part of the interface and above. The discrepancy is attributed to a different sampling scheme and the intermittency of turbulence. The glider offers a noise-free platform suitable for ocean microstructure measurements. | en_US |
dc.language.iso | eng | eng |
dc.publisher | American Meteorological Society | en_US |
dc.title | Microstructure Measurements from an Underwater Glider in the Turbulent Faroe Bank Channel Overflow | en_US |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2014 American Meteorological Society | en_US |
dc.identifier.doi | https://doi.org/10.1175/jtech-d-13-00221.1 | |
dc.identifier.cristin | 1149290 | |
dc.source.journal | Journal of Atmospheric and Oceanic Technology | |
dc.source.40 | 31 | |
dc.source.14 | 5 | |
dc.source.pagenumber | 1128-1150 | |