Measurement of small-scale surface velocity and turbulent kinetic energy dissipation rates using infrared imaging

Shelby Metoyer, Mohammad Barzegar, Darek Bogucki, Brian K. Haus, Mingming Shao

Research output: Contribution to journalArticlepeer-review

Abstract

Short-range infrared (IR) observations of ocean surface reveal complicated spatially varying and evolving structures. Here we present an approach to use spatially correlated time series IR images, over a time scale of one-tenth of a second, of the water surface to derive underlying surface velocity and turbulence fields. The approach here was tested in a laboratory using grid-generated turbulence and a heater assembly. The technique was compared with in situ measurements to validate our IR-derived remote measurements. The IR-measured turbulent kinetic energy (TKE) dissipation rates were consistent with in situ–measured dissipation using a vertical microstructure profiler (VMP). We used measurements of the gradient of the velocity field to calculate TKE dissipation rates at the surface. Based on theoretical and experimental considerations, we have proposed two models of IR TKE dissipation rate retrievals and designed an approach for oceanic field IR applications.

Original languageEnglish (US)
Pages (from-to)269-282
Number of pages14
JournalJournal of Atmospheric and Oceanic Technology
Volume38
Issue number2
DOIs
StatePublished - Feb 2021
Externally publishedYes

Keywords

  • Boundary layer
  • Error analysis
  • Field experiments
  • Heating
  • Remote sensing
  • Small scale processes
  • Surface layer
  • Time series
  • Turbulence
  • Wind stress

ASJC Scopus subject areas

  • Ocean Engineering
  • Atmospheric Science

Fingerprint

Dive into the research topics of 'Measurement of small-scale surface velocity and turbulent kinetic energy dissipation rates using infrared imaging'. Together they form a unique fingerprint.

Cite this