Dissipation measurements using temperature microstructure from an underwater glider.
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Peterson, Algot K.
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Microstructure measurements of temperature and current shear are made using an autonomous underwater glider. The glider is equipped with fast-response thermistors and airfoil shearprobes, providing measurements of dissipation rate of temperature variance, χ, and of turbulent kinetic energy, ε, respectively. Furthermore, by fitting the temperature gradient variance spectra to a theoretical model, an independent measurement of ε is obtained.Both Batchelor (εB) and Kraichnan (εK) theoretical forms are used.Shear probe measurements are reported elsewhere; here, the thermistor-derived εB and εK are compared to the shearprobe results, demonstrating the possibility of dissipation measurements using gliders equipped with thermistors only. A total of 152 dive and climb profiles are used, collected during a one-week mission in the Faroe Bank Channel, sampling the turbulent dense overflow plume and the ambient water above.Measurement of ε with thermistors using a glider requires careful consider.....
JournalMethods in Oceanography
Maturity LevelTRL 5 System/subsystem/component validation in relevant environment
Best Practice TypeGuide
Spatial CoverageFaroe Bank Channel
CitationPeterson, A.K. and Ilke, F. (2014) Dissipation measurements using temperature microstructure from an underwater glider. Methods in Oceanography, 10, pp.44-69. DOI:https://doi.org/10.1016/j.mio.2014.05.002.
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