Accession Number ADA580935
Title Global Modeling of Internal Tides Within an Eddying Ocean General Circulation Model.
Publication Date May 2012
Media Count 14p
Personal Author B. K. Arbic E. J. Metzger J. F. Shriver J. G. Richman P. G. Timko
Abstract Ocean tides, and the atmospherically forced oceanic general circulation and its associated mesoscale eddy field, have long been run separately in high-resolution global models. They are now being simulated concurrently in a high-resolution version of the HYbrid Coordinate Ocean Model (HYCOM). The incorporation of horizontally varying stratification with the addition of atmospheric forcing yields internal tides (internal waves of tidal frequency) in high-latitude, low-stratification regions that are qualitatively different from those in earlier global internal tide models, in which atmospheric forcing and horizontally variable stratification were absent. The internal tides in the new concurrent HYCOM simulations compare well with those measured in along-track satellite altimeter data. The new concurrent simulations demonstrate that the wavenumber spectrum of sea surface height --a measure of the energy contained in different length scales is dominated in some locations by internal tides and in others by mesoscale eddies. Tidal kinetic energies in the new concurrent simulations compare well with those in current- meter observations, as long as sufficient spatial averaging is performed. The new concurrent simulations are being used in the planning of future-generation satellite altimeters, in the provision of boundary conditions for coastal ocean models, and in studies of ocean mixing.
Keywords Altimeters
Internal tides
Internal waves
Ocean currents
Ocean tides
Reprints
Ssh(Sea surface height)


 
Source Agency Non Paid ADAS
NTIS Subject Category 47C - Physical & Chemical Oceanography
Corporate Author Naval Research Lab., Stennis Space Center, MS. Oceanography Div.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1324
Contract Number N/A

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