Modified adjoint method for inverse eddy viscosity estimation for use in coastal circulation models

John Richardson, Vijay Panchang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

The adjoint method is used to develop an objective analysis technique for estimating the vertical eddy viscosity used in three dimensional oceanic models. A cost functional which consists of two terms is formulated. The first term describes the difference, or lack of fit, between model results and available data. The second term measures the variance of the eddy viscosity with depth. Formulation of the cost functional is complete after coefficients (weights) are introduced to vary the relative influence of each of the terms. The ``optimized'' eddy viscosity estimate is obtained by minimizing the value of this functional. Results demonstrate the algorithm's ability to produce valid solutions to the posed problem. The smoothing term provides stability by limiting the change of the eddy viscosity in the vertical, and computer requirements are reduced with use of a ``Vertical Horizontal Splitting'' routine.

Original languageEnglish
Title of host publicationProc 2 Int Conf Estuarine Coastal Model
PublisherPubl by ASCE
Pages733-745
Number of pages13
ISBN (Print)0872628612
Publication statusPublished - 1 Jan 1992
EventProceedings of the 2nd International Conference on Estuarine and Coastal Modeling - Tampa, FL, USA
Duration: 13 Nov 199215 Nov 1992

Publication series

NameProc 2 Int Conf Estuarine Coastal Model

Other

OtherProceedings of the 2nd International Conference on Estuarine and Coastal Modeling
CityTampa, FL, USA
Period13/11/9215/11/92

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Richardson, J., & Panchang, V. (1992). Modified adjoint method for inverse eddy viscosity estimation for use in coastal circulation models. In Proc 2 Int Conf Estuarine Coastal Model (pp. 733-745). (Proc 2 Int Conf Estuarine Coastal Model). Publ by ASCE.