Results 161 to 170 of about 1,017 (205)

Geostrophic boundary current separation from a coast

Journal of Geophysical Research: Oceans, 1987
The idea that backflow along the coast is necessary to produce the by now well documented meandering of a baroclinic two‐layer boundary current in geostrophic balance (Margules current) is explored. A very simple model assuming conservation of potential vorticity in a geostrophic flow yields separation only for a range of low densimetric Froude numbers,
openaire   +1 more source

Baroclinic Instability of Frontal Geostrophic Currents over a Slope

Journal of Physical Oceanography, 2005
Abstract The Phillips problem of baroclinic instability is generalized in a frontal geostrophic model. The configuration used here is a two-layer flow (with quasigeostrophic upper-layer current) over a sloping bottom. Baroclinic instability in the frontal model has a single unstable mode, corresponding to isobaths and isopycnals sloping ...
Pavec, Marc, Carton, Xavier J., Swaters, Gordon   +2 more
openaire   +2 more sources

Geostrophic currents in the south-eastern Indian Ocean

Australian Journal of Marine and Freshwater Research, 1965
Dynamic topographies and geostrophic currents in the upper 1750 m are presented for several cruises between 1960 and 1963. The mean zonal surface circulation is shown to consist of the south equatorial current, 9-14º S., and a weak easterly current between 14º and 32º C.
openaire   +1 more source

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 ...
openaire   +1 more source

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 ...
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +2 more sources