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Biogenic Particle Fluxes at the 34 deg N 21 deg W and 48 deg N 21 deg W Stations, 1989-1990: Methods and Analytical Data Compilation

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Technical rept.

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This technical report represents the results of analyses on opal, organic carbon, nitrogen and phosphorus content in each of 156 specimen samples collected from the moored sediment trap experiment that was a part of JGOFS north Atlantic Bloom Experiment. The analyzed samples represent a spatio- temporal matrix formed by 6 time-series sediment traps that provided 26 periods of uniform and synchronized periods of 14 days. Traps were deployed at 3 depths, 1 km, 2 km and 0.7 km above the bottom, and at 2 stations, 34 deg N 21 deg W and 48 deg N 21 deg W from April 4, 1989 to April 17, 1990, as shown in Tables 1 and 2. Two of the periods were not 14 days, and there was an 18-day hiatus in SeptemberOctober 1989 for changeover of the trap moorings. Some samples were unusable because of the intrusion of fish. Samples were separated into several aliquots by wet-splitting, then water sieved into larger-than- and smaller-than- 1-mm sizes. The fluxes of biogeochemical elements and constituents were determined on these aliquots and size fractions for carbonate by vacuum gasometric method opal by selective leaching method reactive phosphorus by high temperature oxidation hydrolysis method and organic carbon and nitrogen by applying an elementary analyzer. The annual fluxes, fluxes during the bloom, pre- and post-bloom episodes are summarized in Tables 4 to 9. Variability of particle fluxes by each period at the two stations in terms of size, fractions, sedimentary constituents and elements are shown in Tables 10 and 11. The Mol ratios between pairs of critical biogeochemical elements during each episode and annually, shown at various depths and stations, are included in Tables 7 through 11.... Particle flux, Terminal ratio, Bloom, Ocean interior, North Atlantic Ocean.

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  • Biological Oceanography
  • Physical and Dynamic Oceanography

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