Summary:
•Modern mathematical methods are available for a wide variety of applications.
       These methods allow the simultaneous use of many different data types.
       Irregular spatial or temporal data coverage is not a problem.
•New and useful results can be obtained for marine productivity, particle fluxes,
       remineralization rates, air-sea gas exchange rates and other parameters.
•More inverse studies of biogeochemical systems should be undertaken to
       make use of high-quality, global datasets available now or in the near future.