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A one-dimensional physical-biological model study of the pelagic nitrogen cycling during the spring bloom in the northern North Sea (FLEX '76)


A one-dimensional physical-biological model study of the pelagic nitrogen cycling during the spring bloom in the northern North Sea (FLEX '76)



Journal of: 7-734



ISSN/ISBN: 2059-4763

DOI: 10.1357/0022240973224229

Spring bloom in the northern North Sea was studied with a 1-D model of the pelagic ecosystem. The biological and physical submodels were a depth-resolved version of a nitrogen flux model of the lower trophic levels in the pelagic and a level 2 type second-order turbulence closure model, respectively. A realistic overall description of the development of the North Sea ecosystem during the spring bloom was obtained using an adapted parameter set. Onset, duration, magnitude, and daily variability of the net primary production; magnitude of the particulate organic nitrogen export flux to the sea bottom; and magnitude of bacterial production and nitrogen regeneration within the water column were successfully hindcast. A mass budget of nitrogen fluxes within and between the euphotic zone and deeper water layers was derived. The decay of the bloom seemed to be due to strong herbivorous grazing, most likely by herbivorous microzooplankton.

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Accession: 009753495

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A one-dimensional physical-biological model study of the pelagic nitrogen cycling during the spring bloom in the northern North Sea (FLEX '76). Journal of Marine Research 55(4): 687-734, 1997

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