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Record Details

Record 17 of 51525
A case study of the energy dissipation of the gravity wave field based on satellite altimeter measurements
Author and Affiliation:
Huang, N. E.(NASA Wallops Flight Center, Wallops Island, VA, United States)
Parsons, C. L.(NASA Wallops Flight Center, Wallops Island, VA, United States)
Long, S. R.(NASA Wallops Flight Center, Wallops Island, VA, United States)
Bliven, L. F.(Oceanic Hydrodynamics, Inc., Salisbury, MD, United States)
Abstract: Wave breaking is proposed as the primary energy dissipation mechanism for the gravity wave field. The energy dissipation rate is calculated based on the statistical model proposed by Longuet-Higgins (1969) with a modification of the breaking criterion incorporating the surface stress according to Phillips and Banner (1974). From this modified model, an analytic expression is found for the wave attenuation rate and the half-life time of the wave field which depend only on the significant slope of the wave field and the ratio of friction velocity to initial wave phase velocity. These expressions explain why the freshly generated wave field does not last long, but why swells are capable of propagating long distances without substantial change in energy density. It is shown that breaking is many orders of magnitude more effective in dissipating wave energy than the molecular viscosity, if the significant slope is higher than 0.01. Limited observational data from satellite and laboratory are used to compare with the analytic results, and show good agreement.
Publication Date: Jan 01, 1983
Document ID:
(Acquired Nov 28, 1995)
Accession Number: 85A17545
Subject Category: OCEANOGRAPHY
Document Type: Conference Paper
Publication Information: (SEE A85-17476 06-43)
Publisher Information: United States
Meeting Information: 1983 International Geoscience and Remote Sensing Symposium (IGARSS '83); August 31-September 2, 1983; San Francisco, CA
Financial Sponsor: NASA; United States
Organization Source: NASA Wallops Flight Center; Wallops Island, VA, United States
Oceanic Hydrodynamics, Inc.; Salisbury, MD, United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
Imprint And Other Notes: IN: 1983 International Geoscience and Remote Sensing Symposium (IGARSS '83), San Francisco, CA, August 31-September 2, 1983, Digest. Volume 2 (A85-17476 06-43). New York, Institute of Electrical and Electronics Engineers, Inc., 1983, 6 p.
Availability Source: Other Sources
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