Results 191 to 200 of about 21,627 (222)

Geostrophic currents in shelf areas

Continental Shelf Research, 1986
Abstract A method for obtaining geostrophic currents in a stratified ocean is discussed. It combines the use of hydrographic data and numerical modelling. For geostrophic flow in a flatbottom stratified ocean it is shown along the lines of Gill and Clarke (1974 , Deep-Sea Research , 21 , 325–345) that the surface elevation is determined by the
Ole Martin Smedstad, Jan Erik Weber
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Monitoring geostrophic currents at the equator

Deep Sea Research Part A. Oceanographic Research Papers, 1987
Abstract A single intensively sampled (1 km station spacing) density section across the equator from 3°N to 3°S at 140°N15′W was made in November 1984. The close station spacing allowed us to consider the effects of internal wave aliasing and to filter these out of dynamic height computations. Comparison of geostrophic currents with velocity profiles
James N. Moum, Teresa K. Chereskin, Melora M. Park, Lloyd A. Regier   +3 more
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Absolute geostrophic currents in the East Auckland Current region

New Zealand Journal of Marine and Freshwater Research, 2002
Abstract Absolute geostrophic currents are estimated for the full depth of the water column off the north‐east coast of New Zealand for February 1998. This is achieved by objectively‐mapping subsurface Acoustic Doppler Current Profiler (ADCP) data using horizontal length scales determined from repeat high‐resolution Expendable Bathythermograph (XBT ...
P. J. H. Sutton, T. K. Chereskin
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Absolute geostrophic currents in global tropical oceans

Chinese Journal of Oceanology and Limnology, 2016
A set of absolute geostrophic current (AGC) data for the period January 2004 to December 2012 are calculated using the P-vector method based on monthly gridded Argo profiles in the world tropical oceans. The AGCs agree well with altimeter geostrophic currents, Ocean Surface Current Analysis-Real time currents, and moored current-meter measurements at ...
Lina Yang, Dongliang Yuan
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Mode-one internal tides propagating across a geostrophic current

Physics of Fluids, 2021
As a mode-1 internal tide (IT) propagates across a geostrophic current V(x, z), we have investigated the amount of IT energy reflected from the current and the impact of the current on the transmitted wave field. These are quantified by considering the reflection coefficient R and the linear modal energy conversion Pn, where n is the modal number. Here,
Yangxin He, Kevin G. Lamb
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Shaping of the Continental Rise by Deep Geostrophic Contour Currents

Science, 1966
Geostrophic contour-following bottom currents involved in the deep thermohaline circulation of the world ocean appear to be the principal agents which control the shape of the continental rise and other sediment bodies.
B C, Heezen, C D, Hollister, W F, Ruddiman   +2 more
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Ageostrophic, anticyclonic instability of a geostrophic, barotropic boundary current

Physics of Fluids, 2004
After having previously demonstrated the occurrence of ageostrophic, anticyclonic instability (AAI) for several other steady flows, in this paper we further test the hypothesis that rotating, stably stratified, shear flows are generally subject to AAI at finite Rossby (Ro) and Froude (Fr) numbers by calculating the inviscid, incompressible normal modes
Mcwilliams, James C., Molemaker, M. Jeroen, Yavneh, Irad   +2 more
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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,
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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
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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.
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