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| Titel |
Reducing the model-data misfit in a marine ecosystem model using periodic parameters and linear quadratic optimal control |
| VerfasserIn |
M. Jarbi, J. Rückelt, T. Slawig, A. Oschlies |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 2 ; Nr. 10, no. 2 (2013-02-21), S.1169-1182 |
| Datensatznummer |
250018114
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| Publikation (Nr.) |
 copernicus.org/bg-10-1169-2013.pdf |
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| Zusammenfassung |
| This paper presents the application of the Linear Quadratic Optimal Control
(LQOC) method to a parameter optimization problem for a one-dimensional
marine ecosystem model of NPZD (N for dissolved inorganic
nitrogen, P for phytoplankton, Z for zooplankton and D for detritus) type. This ecosystem model, developed by
Oschlies and Garcon, simulates the distribution of nitrogen, phytoplankton,
zooplankton and detritus in a water column and is driven by ocean circulation
data. The LQOC method is used to introduce annually periodic model parameters
in a linearized version of the model. We show that the obtained version of
the model gives a significant reduction of the model-data misfit, compared to
the one obtained for the original model with optimized constant parameters.
The found inner-annual variability of the optimized parameters provides hints
for improvement of the original model. We use the obtained optimal periodic
parameters also in validation and prediction experiments with the original
non-linear version of the model. In both cases, the results are significantly
better than those obtained with optimized constant parameters. |
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