Global correlation of mesoscale ocean variability with seafloor roughness from satellite altimetry

Citation:
Gille, ST, Yale MM, Sandwell DT.  2000.  Global correlation of mesoscale ocean variability with seafloor roughness from satellite altimetry. Geophysical Research Letters. 27:1251-1254.

Date Published:

May

Keywords:

antarctic circumpolar current, drag, geosat

Abstract:

Both seafloor bathymetry and eddy kinetic energy at the ocean surface can be estimated by making use of satellite altimeters. Comparing the two quantities shows that in regions of the ocean deeper than about 4800 m, surface eddy kinetic energy is greater over smooth abyssal plains than over rough bathymetry, while the opposite is true in shallower waters. Thus in the deep ocean, bottom roughness may dissipate eddy kinetic energy. A simple model indicates that the dissipation rate increases as root-mean-squared bottom roughness increases from 0 to 250 m and decreases to negative values (implying eddy generation) for higher roughness.

Notes:

n/a

Website

DOI:

10.1029/1999gl007003