The implicit particle filter is applied to a stochastically forced shallow water model of nearshore
flow, and found to produce reliable state estimates with tens of particles. The state vector of this model consists
of a height anomaly and two horizontal velocity components at each point on a 128 x...
This paper presents a particle method designed for high-dimensional state estimation. Instead of weighing random forecasts by their distance to given observations, the method samples an ensemble of particles around an optimal solution based on the observations (i.e., it is implicit). It differs from other implicit methods because it includes...
An idealized, linear model of the coastal ocean is used to assess the domain of influence of surface type data, in particular how much information such data contain about the ocean state at depth and how such information may be retrieved. The ultimate objective is to assess the feasibility of...
Results from a model of wind-driven circulation are analyzed to study spatial and temporal variability in
the bottom mixed layer (BML) on the mid-Oregon shelf in summer 2001. The model assimilates acoustic
Doppler profiler velocities from two cross-shore lines of moorings 90 km apart to provide improved
accuracy of near-bottom...
Today’s technology-based society makes information more accessible than ever, in turn creating a growing demand for a workforce that has the skills necessary to utilize data. Contributing to this influx of data is Oregon State University (OSU), who was selected to guide the design and construction process of three Regional...
A series of observing system simulation experiments (OSSE) is performed on a simulated data
set which was designed to mimic the wind-forced response of the tropical Pacific ocean. This
data set was constructed by adding random perturbations to the FSU monthly mean pseudostress
anomaly data. These perturbed pseudostress anomaly fields...
A data assimilation system (DAS) of the wind‐driven, mesoscale shelf circulation off the Oregon coast is developed. The DAS assimilates low‐pass filtered surface velocity measurements, obtained from land‐based high‐frequency coastal radar arrays, into a primitive equation coastal ocean model using a sequential optimal interpolation scheme. Inhomogeneous and anisotropic estimates of...
Each year, over 45 countries export 30 million fish from coral reefs as part of the
global marine ornamental aquarium trade. This catch volume is partly influenced
by collection methods that cause mortality. Barotrauma in fish resulting from forced
ascent from depth can contribute to post-collection mortality. However, implementing
decompression...