Use of ship-mounted acoustic doppler current profiler data to study mesoscale oceanic circulation patterns in the Archipielago de Colon (Galapagos Islands) and the Gulf of the Farallones
Steger, John B
Collins, Curtis A.
Schwing, Franklin B.
MetadataShow full item record
Ship-mounted acoustic Doppler current profiler (ADCP) data are used to study regional ocean patterns around the biologically rich regions of the Archipielago de Colon (Galapagos Islands) and the Gulf of the Farallones to test our assumptions about the circulation derived primarily from hydrographic samples. West of the Galapagos, an equatorial undercurrent transporting 7 Sv was present in November 1993, which decelerated within 30 km of the archipelago, shoaled, and diverged with a strong deflection to the southwest. A method of removing tidal velocities from ADCP measurements by creating an empirical model of the tides and using it to predict and subtract the tides is described. It is shown that in the Gulf of the Farallones, a large number of observations, typically more than acquired on one cruise, are necessary to reduce tidal model error. Detided ADCP data are used to describe the circulation in the Gulf under various wind conditions. Over the continental slope, Surface-to-depth poleward flow is present throughout the year. During wind relaxations, poleward flow strengthens and warmer, fresher water is transported onshore
Showing items related by title, author, creator and subject.
Steger, John M.; Schwing, Franklin B.; Collins, Curtis A.; Rosenfeld, Leslie K.; Garfield, Newell; Gezgin, Erhan (2000);Six ADCP and CTD ship surveys of the continental shelf and slope in the vicinity of the Gulf of the Farallones, CA, were conducted in 1990}1992. ADCP data provide much more detail on the structure of the currents over ...
Konstantinidis, Simon (Monterey, California. Naval Postgraduate School, 1992-12);Neglecting the ageostrophic circulation is not very realistic for the ocean circulation in coastal waters andparticularly in regions with strong temperature and salinity gradients like the Farallones Natinal Marine ...
A Study on Hydrographic Conditions and Salt Budget Calculation for the Gulf of Farallones with the Data Collected in August 1990 Gezgin, Erhan (Monterey, California, Naval Postgraduate School, 1991);The circulation pattern observed in the Gulf of Farallones on 5-10 August 1990 was a cyclonic system of flow. Water entered the Gulf from south of the Farallon Islands and left the Gulf between Pt. Reyes and the Farallon ...