Since a few years, a growing number of 3D hydrodynamics ecosystem coupled models operate in the Mediterranean to answer a large spectrum of questions going from operational oceanography to coastal management or more fundamental problems as the consequences of climate change on marine ecosystems. The constraints defined by the modeler are noticeably different if he is an actor of operational oceanography or at the opposite, if observations are needed through time series in order to build a model to simulate the response of an ecosystem to climate change.
These models have to take into account regions with very diversified functioning as in the northwestern Mediterranean, the deep convection dominated by the winter mixing of nutrients, the Rhone dilution area under the control of continental inputs or the oligotrophic Northern Current. Considering first the complexity of biogeochemical models (multi functional groups, multi elements) and second the spatial complexity of the represented areas, it is then important that an observation service could provide to modelers:
1) time series of parameters in different sites representative of the diversity of regions of a basin or a sub-basin
2) time series allowing to characterize fluxes between these different regions.