Schott, Friedrich and Ehrhardt, Manfred (1969) On fluctuations and mean relations of chemical parameters in the northwestern North Sea. Kieler Meeresforschungen, 25 (2). pp. 272-278.

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Abstract

Along three sections and al a one day permanent station chemical parameters (P04, Si04, N02, N03, NH3, and 02) were determined from NANSEN bottle samples. Significant fluctuations of some of these parameters were observed. From a moored current meter array the current field was determined. It was coupled to the concentrations observed at the permanent station. The horizontal gradients of chemical components showed values up to 50% in less than 500 m distance. By use of the diffusion theory some estimates on the time scale of biochemical processes are presented. From the entire set of about 400 observations the mean relation between phosphate and silicate was found to be linear. Nitrate seemed to be the growth limiting factor. The mean relations between phosphate and nitrate and silicate and nitrate respectively differ considerably from a linear function. The oxidative ratios for nitrate, phosphate and silicate have been calculated and the following combination has been found from these regressions:
ΔAOU : ΔP : ΔN : ΔSi = 276 : 1.2 : 14.7 : 7.2

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