OBSERVATIONS AND SIMULATION OF A BOTTOM EKMAN LAYER ON A CONTINENTAL SHELF.

T. D. Dickey, J. C. Van Leer

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Abstract

A numerical model was used to simulate the bottom Ekman layer of a continental shelf region. Conservation equations for momentum, turbulent kinetic energy, and turbulent length scale were utilized in the model. The model was used to simulate data taken from a Cyclesonde mooring on the Peruvian continental shelf in May 1976 as part of the Joint II Coastal Upwelling Ecosystems Analysis program. The Cyclesonde provided mean horizontal velocity, temperature, salinity, and pressure data. An intense poleward undercurrent drove the bottom flow regime. The most striking feature of the data was the clockwise Ekman veering of velocity vectors as the bottom was approached. A 48-hour period was chosen for the model simulations. The vertical profile of speed (48 hours mean) simulated by the model fell within the error bars of the data. The corresponding Ekman spiral display of the model results also showed good agreement with the observations.

Original languageEnglish (US)
Pages (from-to)1983-1988
Number of pages6
JournalJournal of Geophysical Research
Volume89
Issue numberC2
DOIs
StatePublished - Jan 1 1984

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ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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