Near bottom velocity and temperature profiles observed by cyclesonde

A. Mercado, John Van Leer

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Three days of twice hourly temperature and velocity profile data were obtained on the southwest Florida Continental Shelf. Measurements in the bottom boundary layer were made with a Cyclesonde to within 5m of the bottom in a depth of 200m with an average vertical resolution ∼ 5m. In the lowest 30m, temperature was nearly constant and the current vectors rotated clockwise from the bottom upward as in an Ekman spiral (total angle of veering ∼ 13°‐18°), while in the 20m immediately above, the velocity was nearly constant. The bottom stress, τ o =0.22 to 0.48 dynes/cm ² was estimated by determining the non‐geostrophic mass transport within the friction layer. The similarity constant relating the total veering angle and the geostrophic drag coefficient was about 2 to 3. The ratio of the boundary layer thickness to u * /f was about 0.3 to 0.4.

Original languageEnglish (US)
Pages (from-to)633-636
Number of pages4
JournalGeophysical Research Letters
Volume3
Issue number10
DOIs
StatePublished - Jan 1 1976
Externally publishedYes

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benthic boundary layer
bottom stress
drag coefficient
mass transport
velocity profile
temperature profile
temperature profiles
continental shelf
friction
velocity distribution
boundary layer
boundary layer thickness
drag coefficients
vector currents
continental shelves
boundary layers

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Near bottom velocity and temperature profiles observed by cyclesonde. / Mercado, A.; Van Leer, John.

In: Geophysical Research Letters, Vol. 3, No. 10, 01.01.1976, p. 633-636.

Research output: Contribution to journalArticle

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