Transformed flux-form semi-Lagrangian schemes for coastal ocean modeling
Abstract
Numerical approaches in atmospheric and
oceanic modeling inevitably introduce diffusion
(or dissipation) and dispersion into the
approximate solution. From a physical point of
view, advection of a passive tracer is the simple
transition of a quantity. Therefore, dispersion,
the propagation of different spatial scales at
different phase speed, and diffusion are
processes that are aliens to the process that is
being modeled (Chu and Fan 1998, 1999). As
applied to constituent advection problem, these
numerical artifacts manifest themselves as
nonphysical mixing by numerical diffusion,
nonphysical highs and lows in the constituent
field caused by dispersion, and nonphysical
tracer spectra caused by the trapping of tracer in
nonpropagating small spatial scales (Rood 1987).
The less the numerical diffusion and dispersion
errors, the better the model performance is.
Description
Eighth Conference on Coastal Atmospheric and Oceanic Prediction and Process, American Meteorological Society
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Dynamics, stability, and evolutionary patterns of mesoscale intrathermocline vortices
Sisti, Cassandra M. (Monterey, California. Naval Postgraduate School, 2016-12);Mesoscale intrathermocline eddies play an important role in transferring heat, salinity, and momentum in large-scale flows, actively influencing the general circulation of the ocean. Nevertheless, the factors controlling ... -
A theoretical study of meteorological effects on the dispersion of atmospheric contaminants in the coastal environment
McCallister, Michael Alan (Monterey, California. Naval Postgraduate School, 1974-03);Present numerical models describing pollutant diffusion employ two main approaches to the problem. Gaussian bivariate distributions based on the statistical properties of atmospheric flow have the advantages of simplicity ... -
California coastal offshore transport and diffusion experiments meteorological conditions and data
Schacher, G.E.; Spiel, D.E.; Fairall, C.W.; Davidson, K.L.; Leonard, C.A.; Reheis, C.H. (Monterey, California. Naval Postgraduate School, 1982-12-01); NPS-61-82-007Four series of tracer experiments have been performed to parameterize an overwater-coastal transport and diffusion model. The experiment were carried out in the winter and summer near Ventura, CA and Pismo beach, CA. The ...