Abstract
The variability of particulate organic carbon (POC) and nitrogen (PN) concentrations in three different depth layers (10 to 25, 350 to 365, and 985 to 1000 m) was measured at two stations in the Sargasso Sea sampled frequently during periods of 3 and 6 days in February 1975. Within each layer, the concentration ranges were in excess of analytical error indicating measurable variability, although it was not so great as reported for other regions of the ocean with generally higher concentrations of POC and PN. There was no indication that samples with above average concentrations of POC and PN had higher than average concentrations of ATP (except in the surface layer) or zooplankton. The geometric means and ranges of POC and PN concentrations decreased with depth between layers along with ATP and particle volume.
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