Modeling of copepods with links to circulation models

An important step towards realistic models of the marine ecosystem is the coupling of biological and circulation models. While the modelling of the lower trophic levels has made progress in the last years the description of stage-resolving zooplankton is still in a preliminary state. The paper presents a zooplankton model which includes the lower trophic levels of the food web and which can be embedded in a circulation model in a consistent manner. The model has two sets of zooplankton state variables, the biomass and number of individuals of the stages. The model is used to simulate rearing tank experiments under constant environmental conditions. A link to oceanic conditions, with coupling to the lower levels of the food web and annual variations of temperature, is studied by a simple box model version. As the ‘modelcopepod’ we choose Pseudocalanus, but the model can be applied to other species in a straightforward way.

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