Flux measurements from a SWATH ship in SWADE

Kristina B. Katsaros, Mark A. Donelan, William M Drennan

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The Surface Wave Dynamics Experiment (SWADE) took place east of the U.S. Coast in the winter of 1990-1991. A major objective of the research program is to refine our understanding of the relationship between fluxes to the sea surface and the sea state as determined from directional wave spectra. Simultaneous measurements of turbulent fluxes of mass, momentum and energy between sea and air, with the directional wave spectra, were required to meet this objective. In this short article we describe the process of obtaining turbulent flux measurements from a small water-plane-area twin hull (SWATH) ship. We measured turbulent fluxes of momentum, heat and water vapor from a tall mast at the bow of the SWATH ship Frederick G. Creed by the eddy correlation method, while the ship was moving into the wind. Directional wave spectra were obtained from a wave staff array ahead of the bow of the ship. The motion of the ship was recorded and a coordinate rotation was performed for each data sample. After all instrument response and motion corrections have been accounted for, we compare our calculated turbulent fluxes with values computed from another standard method, viz. the inertial dissipation method. This approach is not susceptible to platform motion but relies on assumptions that are not always valid. However, the two methods agree on average within 12%, 20% and 31% for momentum, water vapor and heat fluxes, respectively.

Original languageEnglish (US)
Pages (from-to)117-132
Number of pages16
JournalJournal of Marine Systems
Volume4
Issue number2-3
DOIs
StatePublished - 1993
Externally publishedYes

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flux measurement
ships
hull
hulls
surface wave
wave spectrum
momentum
water vapor
experiment
water
heat
sea state
eddy covariance
research programs
methodology
research program
heat flux
dissipation
sea surface
eddy

ASJC Scopus subject areas

  • Aquatic Science
  • Oceanography

Cite this

Flux measurements from a SWATH ship in SWADE. / Katsaros, Kristina B.; Donelan, Mark A.; Drennan, William M.

In: Journal of Marine Systems, Vol. 4, No. 2-3, 1993, p. 117-132.

Research output: Contribution to journalArticle

Katsaros, Kristina B. ; Donelan, Mark A. ; Drennan, William M. / Flux measurements from a SWATH ship in SWADE. In: Journal of Marine Systems. 1993 ; Vol. 4, No. 2-3. pp. 117-132.
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