GLORIA

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  • 1
    Publication Date: 2022-05-25
    Description: Length, width and projected area (58 species) and weight (53 species) of radiolarian. skeletons, mainly from the Panama Basin PARFLUX sediment trap (5°21.8'N, 82°01.4'W) samples, were measured. Volume and density contrast were computed. The measured mean weight values for the examined species range from 0.05 pg/shell to 24 μg/shell. The weight is best correlated with projected area among the studied size dimensions of Radiolaria as a whole group. The density contrast of the radiolarian skeletons, relative to seawater, generally falls between 0.01 and 0.5 g/cm3 and appear to be constant with an order of magnitude increase of the shell diameter. The sinking speeds of specimens of 55 radiolarian species measured in 3, 10 and 20°C seawater range from 13 to 416 m/day. Despite the wide variety of morphology between the species, the sinking speed is best correlated with weight/shell with reasonably small deviations from a regression line. Using the sinking speeds residence times of the 55 species in the 5 Krn pelagic water column range from 2 weeks to 14 months.
    Description: Prepared for the National Science Foundation under Grant OCE 80-19386.
    Keywords: Radiolaria ; Sedimentation and deposition
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Location Call Number Limitation Availability
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  • 2
    Publication Date: 2022-05-26
    Description: A time series vertical flux assessment of pelagic diatoms was conducted during September, 1982 through September, 1983 at subarctic Pacific Station PAPA (50°N, 145°W; water depth 4200 m) using PARFLUX sediment traps deployed at 1000 and 38000 m. The time series sediment trap samples were collected for 11 to 16-day periods during the year; a total of 24 samples represent a full year's record of flux. Eighteen taxonomic groups of diatoms were enumerated, based on a census of four wet-sieved size fractions: 250-1000μm, 125-250μm, 63-125μm, and 〈 63μm. In order to study the sinking processes of diatoms, detailed information on frustule integrity was acquired. For example , counts of single valves were separated from frustules. Size-fractioned fluxes of all the counting groups are graphically presented, which provides a data base for further investigations.
    Description: Prepared for the National Science Foundation under Grant OCE 85-02472.
    Keywords: Diatoms ; Marine sediments
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Location Call Number Limitation Availability
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  • 3
    Publication Date: 2022-05-26
    Description: A seasonal flux study of silicoflagellates and Actiniscus was conducted at subarctic Pacific Station PAPA (50°N, 145°W; water depth 4200 m) during September, 1982 through August, 1984 using PARFLUX time series sediment traps deployed at 1000 m and 3800 m depths. The time series sediment trap samples were collected for 4 to 16-day periods depending on the samples; most of the samples were collected for 14 to 16-day periods. A total of 47 continuous samples represents nearly a two-year record of the fluxes of silicoflagellate and Actiniscus taxa at 3800 m depth. An additional 12 samples from 1000 m represent a continuous 6-month period which provides a pair of samples from two depths of each time series. Analysis of the paired samples is essential to understand particle sinking processes. Seven silicoflagellate taxa, several additional variants of silicoflagellat.es, and Actiniscus pentasterias group were enumerated, based on a census of four wet sieved size fractions: 250-1000μm, 125-250μm, 63-125μm, and 〈63μm. A total of more than 32x103 specimens were identified to species level and counted in this study. Statistics of the counts are given. The fluxes of silicoflagellate taxa of all four size fractions are graphically presented. This report provides a detailed data base for further investigations of seasonal silicoflagellate fluxes in the area.
    Description: Prepared for the National Science Foundation under Grant OCE 85- 02472.
    Keywords: Silicoflagellates ; Actiniscus pentasterias ; Marine sediments
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Location Call Number Limitation Availability
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