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Showing 1 to 16 of 16 for “"primitive equation model"”.
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Some numerical aspects of developing an operational primitive-equation model for the tropics.
A barotropic primitive equation model on a global tropical grid using operational real data is used to test various boundary conditions and methods of initialization including numerical variational analysis. Comparisons of forecast accuracy are made between staggered and non-staggered grids. All …
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The role of eddy fluxes in the response of the atmosphere to tropical thermal forcing
The applicability of linear models in studying the observed stationary waves is considered. In particular, the time-mean effects of eddy fluxes on the response of the atmosphere to tropical thermal forcing are examined by using a time-dependent, nonlinear, global, baroclinic primitive equation …
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A Diagnostic and Dynamical Study of the Midwinter Minimum of the Pacific Storm Track
… both an idealized quasi-geostrophic two-level model and a relatively realistic primitive equation model. The model results are compared against observations from the perspective of eddy energetics. Remaining questions and their implications are discussed."
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A numerical study of the forcing mechanisms of the Leeuwin current system
… are conducted with a sigma coordinate primitive equation model on a beta-plane. Results show that the LCS is an anomalous eastern boundary current (EBC) that generates a coastal poleward current, an equatorward undercurrent, and highly energetic mesoscale features such as meanders and …
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A numerical study of eddy interactions with a barotropic oceanic jet
… interaction. Utilizing a two layer, nonlinear primitive equation model, an examination of eddy movement is conducted, with focus on eddy/jet interaction. A series of numerical experiments is performed in which the initial separation distance between eddy and jet is varied. The model …
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Isentropic diagnostics of mid-latitude circulation and transport
… are eddy chemical and PV transports related? A primitive-equation model on a sphere, equipped with simple physical parametrizations and on-line tracer transport, is used to investigate these questions. We tackle question (1) by looking for explanations in terms of angular momentum balance and …
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The generation of African waves
… wave activity. A linearized, pseudo-spectral, primitive equation model is used to simulate the response of the observed jet to perturbations on the scale of African waves. Results show that the jet is unstable due to both its horizontal and vertical shears. The sub adiabatic lapse rate, …
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The Effects of Diabatic Heating on Storm Track Dynamics
… tracks are studied in the context of a nonlinear primitive equation model with vertical and horizontal resolution adequate to capture shallow, short wavelength baroclinic waves. The model is forced by realistic orography and diabatic processes including radiative relaxation, surface heating and …
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Shelf currents, ice and wind : a numerical modeling study
… on shelf fronts are examined using numerical models. The models are configured with the characteristics of the East Greenland Current, north of the Denmark Strait, in mind. While the models are heavily idealized, basic physical parameters match the observed ocean. The first part of the thesis …
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Parameter estimation and adaptive modeling studies in ocean mixing
… of physical and numerical parameters of ocean models. This is one step of "adaptive modeling." Adaptive modeling consists of the automated adjustment of self-evaluating models in order to best represent an observed system. In the case of dynamic parameterizations, self-modifying schemes are …
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Topographic preconditioning of open ocean deep convection
… studied using an idealized, three-dimensional, primitive-equation model. A barotropic mean flow impinges on an isolated Gaussian-shaped seamount in a stratified domain with uniform negative surface buoyancy forcing. A region of topographically trapped flow forms over the topography. When this …
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Interaction of an eddy with a continental slope
… Through simple to relatively complicated modeling effort, some of the fundamental properties of the interaction are investigated. In chapter two, the fundamental aspects of the interaction are examined using a simple contour dynamics model. With the simplest model configuration of an ideal …
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Coastal sources of estuarine inflow
… using a series of realistic and idealized ocean models. The first project examines the source of planktonic larvae of the marine invasive species, the European green crab (Carcinus maenas), which was observed in the eastern Salish Sea for the first time in 2016. Green crab spawns were simulated …
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Modeling Nutrient and Plankton Processes in the California Coastal Transition Zone
… time- and space-dependent, physical-bio-optical models have been developed for the California Coastal Transition Zone (CTZ) region with the overall objective of understanding and quantifying the processes th at contribute to the spatial and temporal development of nutrient and plankton …
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Dynamics of the Antarctic circumpolar current : evidence for topographic effects from altimeter data and numerical model output
Geosat altimeter data and numerical model output are used to examine the circulation and dynamics of the Antarctic Circumpolar Current (ACC). The mean sea surface height across the ACC has been reconstructed from height variability measured by the Geosat altimeter, without assuming prior knowledge …