Estimate of eddy energy generation/dissipation rate in the world ocean from altimetry data
MetadataShow full item record
Assuming eddy kinetic energy is equally partitioned between the barotropic mode and the first baroclinic mode and using the weekly TOPEX/ERS merged data for the period of 1993~2007, the mean eddy kinetic energy and eddy available gravitational potential energy in the world oceans are estimated at 0.157 EJ and 0.224 EJ; the annual mean generation/dissipation rate of eddy kinetic energy and available gravitational potential energy in the world oceans is estimated at 0.203 TW. Scaling and data analysis indicate that eddy available gravitational potential energy and its generation/dissipation rate are larger than those of eddy kinetic energy. High rate of eddy energy generation/dissipation is primarily concentrated in eddy rich regions, such as the Antarctic Circumpolar Current and the western boundary current extensions. Outside of these regimes of intense current, the energy generation/dissipation rate is 2 to 4 orders of magnitude lower than the peak values; however, along the eastern boundaries and in the region where complicated topography and current interact the eddy energy generation/dissipation rate is several times larger than those in background.
Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Ocean Dynamics 61 (2011): 525-541, doi:10.1007/s10236-011-0377-8.
Showing items related by title, author, creator and subject.
Thomson, James M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-09)Ocean surface infragravity waves (periods from 20 to 200 s) observed along the southern California coast are shown to be sensitive to the bottom topography of the shelf region, where propagation is linear, and of the ...
Radiation and dissipation of internal waves generated by geostrophic motions impinging on small-scale topography Nikurashin, Maxim (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-02)Observations and inverse models suggest that small-scale turbulent mixing is enhanced in the Southern Ocean in regions above rough topography. The enhancement extends 1 km above the topography suggesting that mixing is ...
Interannual sea level variability in the western North Atlantic : regional forcing and remote response Andres, Magdalena; Gawarkiewicz, Glen G.; Toole, John M. (John Wiley & Sons, 2013-11-20)Annually averaged sea level (1970–2012) measured by tide gauges along the North American east coast is remarkably coherent over a 1700 km swath from Nova Scotia to North Carolina. Satellite altimetry (1993–2011) shows that ...