In-situ registration of oxygen utilization at sediment-water interfaces |
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Authors: | H.P. Hansen K. Grasshoff J. Petersen |
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Affiliation: | Institut für Meereskunde an der Universität Kiel, Düstenbrookerweg 20, D2300 Kiel G.F.R. |
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Abstract: | A polyacrylic dome was anchored over natural sediments, enclosing a water volume of 0.125 m3 over an area of 0.45 m2 of sediment. A vertical convection was produced in the dome, by means of a small pump, to prevent formation of gradients. Oxygen partial pressure and temperature were measured at 20-min intervals by an automatic data system and stored on magnetic tape in digitized form. After some days the system was recovered. The data were read by a microprocessor system, interpreted, listed and plotted against time. Chemical and hydrographic data, from a sample taken at the location of the experiment at the instant it was started, were used as calibration data to calculate oxygen utilization of the sediments in the Kiel Bight. |
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