Read e-book online Advanced Ocean Modelling: Using Open-Source Software PDF

By Jochen Kämpf

ISBN-10: 3642106102

ISBN-13: 9783642106101

This publication introduces the reader to complex tools utilized in the computer-based modelling of fluid procedures. This contains nonhydrostatic procedures comparable to breaking inner waves and density-driven convection, however the version code is usually used to simulate an El-Niño occasion! The publication comprises 25 sensible routines, utilizing freely to be had Open-Source software program suites, that are widespread through the medical group. during this publication, the artwork of hydrodynamic modelling is made on hand and obvious to a much wider readership. an enticing byproduct of the booklet is that effects are animations instead of nonetheless photos. version codes and animation scripts for all routines are provided on an internet site. The reader can undertake version codes for personal autonomous studies

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2 2D Vertical-Slice Modelling 23 Fig. 2 The two-dimensional vertical ocean slice The continuity equation (Eq. 3 shows the configuration of the Arakawa C-grid (Arakawa and Lamb, 1977) applied to the vertical ocean slice. This grid is the basis for all exercises of this book. Vertical location is defined by the level index i and vertical grid spacing Δz. The uppermost grid cell carries the index i = 1, whereas i = nz points to the bottom layer. e. density) are centred between u- and w-velocity grid points.

Pond and Pickard, 1983). Does the model yield the same result? If not, explore the timeaverage values of the results and consider what you have learned about inertial oscillations. 1 Boundary-Layer Equations A bottom Ekman layer develops owing to frictional effects experienced by a flow in contact with the sea floor. For simplicity, this ambient (geostrophic) flow of vector components u geo and vgeo is assumed to be horizontally uniform and the sea floor is assumed to be plane. 21) where uˆ = u − u geo and vˆ = v − vgeo are flow variations with respect to the ambient flow.

41), although it should be zero in theory, is included in this scheme to avoid accumulation of small but persistent round-off errors that could lead to artificial and unwanted internal sources or sinks of B. , 1928). 4 Implementation of Density Diffusion For uniform grid spacings, the explicit finite-difference versions of the density diffusion terms in Eq. 13 shows the locations at which these values are determined. Vanishing diffusive fluxes across solid boundaries require the use of zero-gradient conditions for density.

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Advanced Ocean Modelling: Using Open-Source Software by Jochen Kämpf

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