Objective analysis for coastal regimes
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Statistical interpolation of coastal oceanic fields is addressed within the general framework of Gauss-Markov estimation. Computation of the prior covariance of the field to be estimated is posed as a stochastically-forced differential equation subject to coastal boundary conditions with inhomogeneous, anisotropic parameters. Solution is readily implemented in standard finite element methodology. Examples illustrate the method for idealized one-dimensional situations. Analysis of real biological data from Massachusetts and Cape Cod Bay is shown, using a covariance function derived from velocity and diffusivity fields computed with a hydrodynamic model. The procedure defaults to standard OA methods using distance-based covariance functions. far from boundaries and inhomogeneities. (C) 2001 Elsevier Science Ltd. All rights reserved.