Rückelt, Johannes, Oschlies, Andreas and Slawig, Thomas (2010) Optimization of Parameters and InitialValues in a Marine NPZD-Type Ecosystem Model. . Bericht / Institut für Informatik der Christian-Albrechts-Universität zu Kiel, 1013 . Christian-Albrechts-Universität zu Kiel. Institut für Informatik, Kiel, Germany, 24 pp.

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Abstract

Parameters and initial values of a one-dimensional marine ecosystemmodel are optimized using a gradient-based optimization algorithm takinginto account parameter bounds. Sensitivities of the optimized parametersw.r.t. errors in observations and initial values are studied numerically andfound to yield parameter ranges narrow relative to the a priori parameteruncertainty reflected in upper and lower bounds on the permitted pa-rameter range. This means, that optimal parameters can be determinedaccurately. We find, that optimizing for the initial values along with theparameters can greatly improve the model’s fit to the observations

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