The modeling ecosystems dynamics groups at SDSU is a partnership between the Computational Science Research Center (CSRC) at SDSU and the Center for Hydro-Optics & Remote sensing at SDSU to address the many complex problems in our coast and oceans. This session will present some of the work that has been going along these lines from data collection and modeling to prediction.
Eddy Paths in the Gulf of Mexico by 3D Numerical Models
Instituto de Investigaciones Oceanologicas
Abstract: The momentum equations describing a three-dimensional stratified flow in the beta-plane in the Gulf of Mexico basin are solved numerically using two models. Westward anticyclonic propagation as well as eddy-topography interaction are studied. It is found that typical anticyclonic westward path is modified by the vertical eddy structure, eddy-eddy interaction and their interaction with the shape of the basin.
Jorge Quispe Sanchez
The aim of is study is the investigation to characterize the hydrodynamics
of physical processes in the Bay Paracas (13°40' S,76°20' W)
located in Pisco, Perú. The hydrodynamic three-dimensional model
ELCOM (Estuary and Lake Computer Model) was developed by B.R. Hodges,
Centre Water Research (CWR) of the University of Western Australia (UWA).
In order to use ELCOM model in the Bay Paracas, field measurements were
performed to obtain the bathymetry of the Bay, hydrographic data to
establish initial conditions, and boundary data to incorporate to the
model. The model it solved on a rectangular cartesian grid, based on
the grid of Arakawa-C. The ELCOM model considers the Navier-Stokes equations
with hydrostatic and Boussinesq approximation, the transport equation
with one approximation by turbulent viscosity in the horizontal. The
hydrodynamics simulation at the moment solves the equations of conservation
for incompressible fluids using an semi-implicit scheme adapted of the
family of TRIM models, based on the Euler-Lagrange quadratic method
for the advection of the moment with a solution of conjugated gradient
for the free surface The model was used in a cartesian rectangular grid
dx = dy = 71m, forced with series time of tide, solar radiation, speed
and wind direction, temperature of the air, relative humidity,with different
initial and boundary conditions imposed to the model to analyze the
ELCOM capacity and to reproduce environmental coastal conditions in
the bay. Results of numerical simulation show the currents velocities
and temperature, it include baroclínics and barotropic answers,
rotational effects, tide forcing, wind, surface heating and salt transport.
Tree-dimensional numerical simulations were use to investigate the behavior
of currents dynamics and temperature by environmental forcing. Simulations
are presented and compared with field data observed; its results contribute
to a better understanding of currents velocities and temperature variability
in the Bay Paracas.
Pressure Gradient Calculations in Curvilinear Models: The GCOM Case
Sorayda A. Tanahara
Calculation of pressure gradients in three-dimensional stratified ocean
models that use bottom-following sigma coordinates can lead to large
errors near steep bathymetry. Ideally, a density stratified fluid, initially
at rest and unforced, should continue to remain so indefinitely in time.
However, this property may not be preserved, due to numerical errors
associated with the numerical discretization of the horizontal pressure
gradient terms if the vertical coordinate system differs from a z-coordinate
Center for Integrative Coastal Observations, Research
and Education (CICORE): A Coastal Observing Program
Center for Hydro-Optics and Remote Sensing
1Trees, C., 2P. Bissett, 3K. Cole, 4M. Craig, 5D. Dugdale, 5T. Garfield, 3K. Kamer, 2D. Kohler, 6R. Kvitek, 7M. Moline, 1J. Mueller, 8R. Piper, 9F. Shaughnessy and 10R. Zimmerman
1Center for Hydro-Optics and Remote Sensing,
San Diego State University, San Diego, CA USA
Abstract: The California State University (CSU) Center for Integrative Coastal Observations, Research and Education (CICORE) is an applied coastal research center distributed throughout California. CICORE was established in 2002 with funding from the NOAA Coastal Observation Technology System (COTS) in an effort to create a coastal monitoring and research observatory network for the entire 1200 miles of the California coast. It utilizes the unique distribution of the CSU campuses to create a coastal ocean observatory along the entire California coastline that focuses on the region from 100 meter deep up to and on to the shore, including estuaries, wetlands, and other critical coastal habitats. CICORE uses three core technologies (high resolution acoustic bathymetry and habitat mapping, high resolution airborne hyperspectral imagery and in-situ water quality and meteorological monitoring) to address economically and environmentally important challenges such as coastal erosion, watershed impacts, chemical contamination of food webs, depletion of marine commercial resources, toxic plankton blooms, marine pathogens and the rapid invasion of coastal waters by non-indigenous species. The objectives of CICORE are (1) to establish research & monitoring infrastructure of critical coastal habitats in California. (2) to develop models for predicting change in coastal environments, (3) to enhance management capability of regulatory & resource management agencies, and (4) to enhance public awareness of the importance of coastal management. The CICORE program will be discussed in the context of the Global Ocean Observing System (GOOS) for observations, modeling and analysis of marine and ocean variables to support operational ocean services worldwide.