A methodology for Thorpe scaling 512 Hz fast thermistor data from buoyancy-driven gliders to estimate turbulent kinetic energy dissipation rate in the ocean

Philip Leadbitter, Rob Hall, Alexander Brearley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

A Kongsberg Seaglider with a microstructure package was deployed in the Faroe-Shetland Channel in 2017 as part of the 4th Marine Autonomous Systems in Support of Marine Observations (MASSMO4). Using the FP07 fast thermistor (512 Hz), the standard Seaglider thermistor (0.2 Hz) and potential density calculated from Seaglider conductivity-temperature sail (0.2 Hz) a comparison of the Thorpe Scale method has been made. Through this method turbulent kinetic energy (TKE) dissipation rates are inferred from the length-scale of a turbulent overturn. Comparison of the three physical quantities show that overturns with a comparable length-scale also have a comparable TKE dissipation rate. The range of estimated TKE dissipation rates from the 0.2 Hz data is also comparable to those inferred using the same method applied to potential density calculated from a ship mounted CTD.
Original languageEnglish
Title of host publicationOCEANS 2019 MTS/IEEE Seattle, OCEANS 2019
Place of PublicationOnline
PublisherIEEE Conference Publications
Number of pages6
ISBN (Electronic)9780578576183
ISBN (Print)9780578576183
DOIs
Publication statusPublished - 20 Jan 2020

Publication series

NameOCEANS 2019 MTS/IEEE Seattle, OCEANS 2019

Keywords

  • Seaglider
  • Thorpe Scale
  • Ocean Mixing
  • Autonomous Vehicles
  • Ocean mixing
  • Thorpe scale

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