Using a linear quasi-geostrophic model of large scale spiraling flow and vertical density
gradient in the eastern North Pacific, we evaluate the complex dispersion relationships
for quasi-geostrophic waves. Our calculations indicate that the geostrophic circulation
of the eastern North Pacific can locally convert potential energy to mesoscale
kinetic energy on...
The fall-winter surface current field off Oregon was determined
by analysis of ten years of drift bottle data. Computer programs were
developed for generating bottle tracks on a numerical grid, for interpolating
bottle velocity components to fill void grid points and for
smoothing irregularities in the velocity fields. Charts are...
The geopotential anomalies and the average meridional geostrophic
flow off Newport, Oregon, were computed from the data taken
during twenty-one hydrographic cruises.
The annual average of geopotential anomaly was 1.31 dynamic
meters with a seasonal variation of the order of 14 dynamic centimeters.
Highest values of geopotential anomaly occurred in...
A long and gradual transition between the summer and winter
oceanic regimes was observed off Oregon during the autumn of 1980.
Hydrographic sections and a single current meter mooring between
August and December show the ocean possessed characteristics during
fall that have not been observed during other seasons: a slow...
The physical characteristics of continental shelf waters off
Oregon during late winter and spring of 1975 are described and compared
with observations taken previously during summer. The currents
in winter are barotropic in the monthly means while in summer
the currents are baroclinic. Alongshore current fluctuations on the
We sharpen our view of an eastern boundary current region during
the upwelling season through the analysis of several data sets.
We focus on the mesoscale flow field off of northern California,
observed during the Coastal Transition Zone (CTZ) experiment of 1988.
First, we estimate tidal currents in the region...
This report summarizes the Seasoar and CTD observations from Wecoma
cruises W9306A (5 June to 12 July, 1993) and W9308B (14 August to 22 September
1993) conducted as part of the Eastern Boundary Currents Accelerated Research
Initiative, under funding by the Office of Naval Research. The cruises were
The distribution of herring (Clupea harengus pallasi) in
the Northeast Pacific extends from southern California to
northern Alaska. Studies on variation in herring life-history
are limited to local
characteristics and recruitment
populations or relatively restricted regions of the Northeast
Pacific. In this study I assessed herring life-history
patterns and recruitment...