Results 201 to 210 of about 21,627 (222)

On the ignition of geostrophically rotating turbidity currents

Sedimentology, 1999
Two models of a geostrophically rotating turbidity current are examined to compare predictions for ignition with the catastrophic state. Both models describe the current as a tube of sediment‐laden water traversing along and down a uniform slope. The first (four‐equation) model neglects the energy required to lift the sediment from the seabed into ...
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How faithfully will the geostrophic currents represent the existing ocean currents?

Journal of the Oceanographical Society of Japan, 1972
It is widely recognized that the geostrophic flows computed by the dynamic method of Bjerknes and collaborators represent the actual currents pretty faithfully. However, what would be the reason that a geostrophic current derived by only retaining the terms of Coriolis and the pressure gradient forces in the hydrodynamical equations agrees so closely ...
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The boundary currents east and north of Madagascar: 1. Geostrophic currents and transports

Journal of Geophysical Research: Oceans, 1988
Geostrophic currents and transports in the boundary currents near Madagascar are described for a section at 23°S off the east coast and at 12°S to the northeast of Cape Amber. These results are based on conductivity‐temperature‐depth and expendable bathythermograph sections made during cruises of the Marion Dufresne in 1984, 1985, and 1986 ...
John Swallow, Michèle Fieux, Friedrich Schott   +2 more
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Estimates of Geostrophic Surface Currents in the South Atlantic Bight

Marine Geodesy, 2009
The determination of long-term trends in the behavior of the Gulf Stream is critical to understanding the meridional heat transfer cycle and associated global climate change. In this study, in situ current measurements from cross-stream transects of an Acoustic Doppler Current Profiler (ADCP) were used in conjunction with satellite altimetry data to ...
Dara D.H. Cadden, Richard Styles, Bulusu Subrahmanyam   +2 more
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Mesoscale Geostrophic Currents and Optimal SSH Mapping

2017
Ocean Surface Current Analyses-Realtime currents (OSCAR, podaac.jpl.nasa.gov) are global ocean surface velocities calculated from sea surface height (SSH) gradients, ocean vector winds, and sea surface temperature fields using geostrophy, Ekman, and thermal wind dynamics.
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Mixing by low‐ and high‐resolution surface geostrophic currents

Journal of Geophysical Research: Oceans, 2010
The nature of mixing near the ocean's surface is investigated by considering passive tracer advection by currents derived geostrophically using sea surface height fields that differ in their spatiotemporal resolution. One is a low‐resolution field that can be thought of as being derived using current‐generation groundtrack altimetric measurements.
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Trapped internal gravity waves in a geostrophic boundary current

Journal of Fluid Mechanics, 1993
The effect of a geostrophic boundary current on internal gravity waves is studied with a reduced-gravity model. We found that the boundary current not only modifies the coastal Kelvin wave, but also forms wave guides for short internal gravity waves. The combined effects of current shear, the boundary, and the slope of the interface create the trapping
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Geostrophic currents derived from oceanic density over the Hikurangi Trench

New Zealand Journal of Geology and Geophysics, 1964
Abstract Temperature and salinity measurements obtained at nine stations off the east coast of the North Island of New Zealand are presented. The relative currents determined from these stations, which were over the Hikurangi Trench, indicate the presence of localised easterly (or south-easterly) surface-water movements, with speeds up to ahout 50 cm ...
Cha Erb Sdubbundhit, A. E. Gilmour
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A comparison between geostrophic and current meter observations in a California current eddy

Deep Sea Research Part A. Oceanographic Research Papers, 1982
Abstract An eddy was observed about 200 km west of the central California coast using geostrophic estimates and a combined Eulerian-Lagrangian method. The eddy was about 80 km in diameter, with a depth-dependent rotational period of between 15 and 32 days. Spin rates were 6 to 20 cm−1 at 150 m and 1 to 8 cm s−1 at 1500 m.
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Geostrophic Current and Associated Vertical Motion off Northeastern Taiwan

1991
Abstract The geostrophic velocity changes its direction with increasing depth by thermal wind relationship. The rate of rotation with depth is related to the vertical velocity by Hide's theorem. A method for calculating the three-dimensional absolute velocity by means of Hide's theorem and beta vorticity dynamics is developed.
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