Application of surface spline interpolation in inversion of bottom friction coefficients

Application of surface spline interpolation in inversion of bottom friction coefficients AbstractA new method for the inversion of bottom friction coefficients (BFCs) in a two-dimensional tidal model is proposed in this study. In this method, the field of BFCs is constructed by interpolating values at independent points using a surface spline. The surface spline interpolation has an advantage that the constructed surface is more smooth while the surface constructed by the traditionally used linear interpolation has unrealistic extrema. The method is validated in twin experiments where the prescribed nonlinear distribution of BFCs are better inverted with the surface spline interpolation. In practical experiments, the BFCs are inverted and the M2 tide in the Bohai Sea is simulated by assimilating the T/P data. The small errors between simulation results and observations as well as the accurate co-tidal charts demonstrate feasibility of the new method in practical application. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Atmospheric and Oceanic Technology American Meteorological Society

Application of surface spline interpolation in inversion of bottom friction coefficients

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0426
D.O.I.
10.1175/JTECH-D-17-0012.1
Publisher site
See Article on Publisher Site

Abstract

AbstractA new method for the inversion of bottom friction coefficients (BFCs) in a two-dimensional tidal model is proposed in this study. In this method, the field of BFCs is constructed by interpolating values at independent points using a surface spline. The surface spline interpolation has an advantage that the constructed surface is more smooth while the surface constructed by the traditionally used linear interpolation has unrealistic extrema. The method is validated in twin experiments where the prescribed nonlinear distribution of BFCs are better inverted with the surface spline interpolation. In practical experiments, the BFCs are inverted and the M2 tide in the Bohai Sea is simulated by assimilating the T/P data. The small errors between simulation results and observations as well as the accurate co-tidal charts demonstrate feasibility of the new method in practical application.

Journal

Journal of Atmospheric and Oceanic TechnologyAmerican Meteorological Society

Published: Jul 11, 2017

References

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