Browse by Archive
ScholarsArchive at Oregon State University
|
Optical oceanography models of attenuation and scattering properties often
contain simple spectral relationships. Electromagnetic theory, however, predicts
fluctuations in the spectra of the attenuation coefficients and scattering properties of...
1995-07-15 (iso8601)
|
|
The solar energy flux as a function of depth (the irradiance profile) in the ocean is an important function. It influences the dynamics of the mixed layer via the heat budget as well as the biology of the euphotic zone. The following...
1980-09-20 (iso8601)
|
|
Optical and hydrographic observations were made at two meridional sections across the Cromwell Current at 92°00’ and 91°40’W during February 1969. The distribution of hydrographic and optical properties near the Galapagos Islands is described....
1973-05-20 (iso8601)
|
|
A method is described for determining the index of refraction distribution and the particle size distribution
of suspended particles. The distribution s are obtained by breaking down an observed volume
scattering function into its contributing...
1974-09-20 (iso8601)
|
|
A simple heat budget model for a radiation-dominated mixed layer of constant depth is presented. In this model the influence of the vertical irradiance (heat flux) profile is examined by means of the Jerlov [1976] optical water type...
1981-07-20 (iso8601)
|
|
A method for predicting oceanic productivity from remotely sensed diffuse attenuation (488 nm) and
surface chlorophyll concentration is presented. The method uses a climatological approach which consists
of applying a set of regressions for each...
1993 (iso8601)
|
|
An expression for the ratio of the upwelling nadir radiance L(π, z) and the downwelling scalar irradiance Eod(Z) is derived from the following equation of radiative transfer. This expression is given by RSR(z)=[L(π, z)]/Eod(Z) =...
1995-07-15 (iso8601)
|
|
An expression is derived for the rate at which the diffuse attenuation coefficient for vector
irradiance approaches its asymptotic value in a homogeneous medium. The asymptotic approach
rate is shown to be a function of boundary conditions at the...
1989 (iso8601)
|
|
It has been recognized since the 1950's that radioisotopic
disequilibrium between naturally occurring parent-daughter
isotope pairs in seawater can provide information
on the rate of processes segregating them. In the surface
ocean, the...
2001-07-15 (iso8601)
|
|
Mg/Ca ratios in planktonic foraminifera reflect calcification temperatures and are thus useful for sea
surface temperature (SST) reconstructions. Despite the obvious utility of this paleoceanographic tracer,
problems of dissolution, gametogenic...
2003-02-08 (iso8601)
|
|
The collapse of the Laurentide Ice Sheet over Hudson
Bay ~8.47 ka allowed the rapid drainage of glacial Lake
Agassiz into the Labrador Sea, an event identified as
causing a reduction in Atlantic meridional overturning
circulation (AMOC) and the...
2009-07-18 (iso8601)
|
|
The rip current field resulting from the transformation of surface gravity waves over
offshore submarine canyons is studied. Employing a wave transformation model and a
wave-induced circulation model over observed bathymetry we find that wave...
2005-12-08 (iso8601)
|
|
The dynamics of vorticity motions forced by wave groups incident on an
alongshore-uniform barred beach are analyzed. For both normally and obliquely incident
wave groups, the potential vorticity and enstrophy equations reveal that the temporal...
2009-08-08 (iso8601)
|
|
We examine the effects of wave-current interaction on the dynamics of instabilities of
the surf zone longshore current. We utilize coupled models for the simulation of the
incident waves and the wave-induced nearshore circulation. The coupling...
2003-05-03 (iso8601)
|
|
Data from an array of bottom pressure gauges and a string of current meters in the vicinity of 47°N,
139°W, are used to examine the deep-ocean variability forced by ocean surface wind stress curl from
August 1987 to June 1988. Bottom geostrophic...
1993-12-15 (iso8601)
|
|
A thermistor chain was towed 1400 km through the eastern North Pacific subtropical frontal zone in
January 1980. The observations resolve surface layer temperature features with horizontal wavelengths of
0.2-200 km and vertical scales of 10-70 m....
1988-03-15 (iso8601)
|
|
Satellite observations of ice motion are combined with
model estimates of low-level winds and surface wind stress
to provide evidence for atmospheric control of sea-ice
motion through Nares Strait, between Ellesmere Island and
Greenland, during...
2006-01-28 (iso8601)
|
|
The Oregon Coastal Transition Zone (OCTZ) extends several hundred
kilometers offshore where shelf flows interact with the northern California Current. A
primitive-equation numerical ocean model is used to study the upwelling circulation in this...
2009-02-13 (iso8601)
|
|
In this study, we use a time domain numerical model based on the fully nonlinear extended Boussinesq equations [Wei et al., 1995] to investigate surface wave transformation and breaking-induced nearshore circulation. The energy dissipation due to...
1999-09-15 (iso8601)
|
|
The focus of the paper is the analysis of the flow in rip current systems generated by
channels in longshore bars on a beach. The horizontal variations of rip current systems are
described through the use of the quasi-three-dimensional nearshore...
2003-06-08 (iso8601)
|
|
The optical intensity signals from surf zone waves in a laboratory flume are analyzed
using several different phase-averaging techniques, and a methodology is developed for
estimating wave roller lengths and local wave dissipation. The intensity...
2009-07-22 (iso8601)
|
|
Models for surface gravity wave propagation in the presence of currents often assume the current
field to be quasi-stationary, which implies that the absolute wave frequency is time invariant.
However, in the presence of unsteady currents or...
2007-12-03 (iso8601)
|
|
Wave and current measurements are presented from a set of laboratory experiments
performed on a fixed barred beach with periodically spaced rip channels using a range of
incident wave conditions. The data demonstrate that the presence of gaps in...
2002-06-28 (iso8601)
|
|
The POM-SAT model for comparing air and
ground temperatures is based on the supposition that surface
air temperature (SAT) records provide a good prediction
of thermal transients in the shallow subsurface of the Earth.
This model consists of two...
2007-10-09 (iso8601)
|
|
The coastal ocean may experience periods of fluctuating
along-shelf wind direction, causing shifts between
upwelling and downwelling conditions with responses that
are not symmetric. We seek to understand these asymmetries
and their implications...
2004-02-25 (iso8601)
|
