Kattner, G., Hammer, K. D., Eberlein, K. and Brockmann, U. (1980) An attempt to determine fluxes of nitrogen and phosphorus in special time periods during FLEX '76. Meteor Forschungsergebnisse: Reihe A, Allgemeines, Physik und Chemie des Meeres, 22 . pp. 99-104.

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Abstract

Measurements of nutrients and the elements phosphorus and nitrogen from the central station in FLEX '76 were used to calculate mass fluxes and budgets for these elements in defined time and depth intervals. The intervals were defined using hydrodynamic and biological criteria. Within these periods rates of increase and decrease were calculated for nitrate, ammonium, phosphate, particulate nitrogen and phosphorus. These rates were also calculated for the layer above and below the main thermocline. The element budget was balanced within some of the defined intervals. This was possible by only considering biological, chemical, and vertical physical interactions at the central station. At the beginning of the phytoplankton bloom we found fluxes with a maximum of 28 ngat · l-1 · d-1 for phosphorus and 590 ngat · l-1 · d-1 for nitrogen. Interaction diagrams are shown for mass fluxes for three periods during the plankton bloom.

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