000K utf8 1100 $c2010 1500 eng 2050 urn:nbn:de:101:1-201202294282 3000 Rückelt, Johannes 3010 Oschlies, Andreas 3010 Slawig, Thomas 4000 Optimization of Parameters and Initial Values in a Marine NPZD-Type Ecosystem Model [Rückelt, Johannes] 4209 Parameters and initial values of a one-dimensional marine ecosystem model are optimized using a gradient-based optimization algorithm taking into account parameter bounds. Sensitivities of the optimized parameters w.r.t. errors in observations andinitial values are studied numerically and found to yield parameter ranges narrow relative to the a priori parameter uncertainty reflected in upper and lower bounds on the permitted parameter range. This means, that optimal parameters can be determined accurately. We find, that optimizing for the initial values along with the parameters can greatly improve the model's fit to the observations. 4950 https://nbn-resolving.org/urn:nbn:de:101:1-201202294282$xR$3Volltext$534 4961 https://macau.uni-kiel.de/receive/macau_mods_00001825 5051 004