Tomographic measurements of barotropic motions
Bushong, Paul J.
MetadataShow full item record
LocationNorth Pacific Ocean
In 1983, continuous acoustic transmissions centered at 133 Hz and with a resolution of 60 ms were transmitted for five days from Oahu to the coast of Northern California (4000 km range). A maximum likelihood estimate of the change in acoustic travel time (based on phase) between received pulses is used to estimate barotropic fluctilations. Analysis of the resulting time series reveals resonant oscillations at nontidal frequencies in the Northeast Pacific. Some of the periods of the resonant oscillations are consistent with theory (Platzman, Curtis, Hansen, and Slater, 1981). A Wiener filter is formulated for estimating the barotropic tides from a basin scale tomographic array. Error analyses indicate an ability to estimate barotropic currents and surface displacements with errors less than 0.01 cm/s and 1 cm, respectively, over a large portion of the Northeast Pacific.
Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution August 1987
Showing items related by title, author, creator and subject.
Flood, Roger D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1978-01)Many of the small-scale topographic features (dimensions of centimeters to kilometers) found on the Blake-Bahama Outer Ridge (western North Atiantic, water depth greater than 4000 m) and in the Rockall Trough (northeastern ...
Li, Weichang (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-02)This thesis develops methods for estimating wideband shallow-water acoustic communication channels. The very shallow water wideband channel has three distinct features: large dimension caused by extensive delay spread; ...
Bohlen, Walter Franklin (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1969-08)A series of laboratory experiments were performed to ascertain the extent and manner of turbulence modification induced by low concentration suspended loads of near neutral buoyancy. Hot-wire measurements of the fluid ...