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Diapycnal mixing and the internal wave field north of the Kerguelen Plateau
Citation
Meyer, A, Diapycnal mixing and the internal wave field north of the Kerguelen Plateau (2014) [PhD]
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Official URL: https://eprints.utas.edu.au/18702/
Abstract
Dissipating internal waves are the main source of mixing in the stratified
ocean. Recent observational and modelling studies in the Southern Ocean
primarily associate the generation of internal waves with either wind forcing
or with rough topography. This work explores the nature of mixing and its
sources north of the Kerguelen Plateau, a large topographic feature in the
Southern Ocean. Based on novel observations, we present the distribution
and intensity of mixing, and the internal wave field properties.
This thesis includes (i) a regional description of the Kerguelen Plateau oceanographic characteristics; (ii) estimates of mixing and its sources; and (iii) a study of the internal wave field in the vicinity of the Plateau. The data consist of 914 temperature, salinity, pressure and horizontal velocity profiles from Electromagnetic Autonomous Profiling Explorer (EM-APEX) floats deployed northeast of the Kerguelen Plateau in 2008. We are able to estimate diapycnal mixing in the upper 1600m of the water column. To estimate mixing, we apply both a Thorpe-scale analysis on density inversions and a shear-strain parameterization method and compare the estimates with direct microstructure measurements.
Item Details
Item Type: | PhD |
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Keywords: | Southern Ocean, oceanography, Kerguelen Plateau, mixing, turbulence, internal waves, EM-APEX floats, observations, Thorpes scales, finescale parameterization, transport, ocean dynamics |
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: | Meyer, A (Dr Amelie Meyer) |
ID Code: | 125707 |
Year Published: | 2014 |
Deposited By: | Oceans and Cryosphere |
Deposited On: | 2018-05-01 |
Last Modified: | 2018-05-01 |
Downloads: | 0 |
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