Polyakova, Ye I (2003): Table 1: Diatom distribution in surface sediments of the Kara Sea [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.804559, Supplement to: Polyakova, YI (2003): Diatom assemblages in surface sediments of the Kara Sea (Siberian Arctic) and their relationship to oceanological conditions. In: Stein, R; Fahl, K; Fütterer, D K; Galimov, E M & Stepanets, O V (eds.), Siberian River Run-off in the Kara Sea: Characterisation, Quantification, Variability, and Environmental Significance, 488 pp. Proceedings in Marine Sciences, Elsevier, Amsterdam, 6, 375-399
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Abstract:
Diatom assemblages in 62 surface sediment samples from the outer Ob and Yenisei estuaries and the adjacent inner Kara Sea shelf were examined in relation to environmental conditions. Concentrations of diatoms reflect the biological productivity of surface waters along with specific water mass processes of diatom valve deposition in the zone of intermixing of riverine and marine waters. An inverse relationship between total concentration of diatom valves in sediments and surface water salinity is found. Extremely high abundances of diatom valves (up to 82.4 million valves/g sediment) are observed in the outer Ob and Yenisei estuaries (salinity < 5) and are related to a zone with rapid deposition of riverine organic matter. The overall distribution pattern of freshwater diatoms indicates the inflow of river water onto the shelf and follows the general pattern in surface water salinity. A linear regression between average summer surface water salinity and relative proportions of freshwater diatoms reveals a correlation coefficient of r = 0.86 for a salinity range of ~ 5 to 20. The distribution of sea-ice diatoms in the surface sediments generally reflects the sea-ice conditions during spring and summer time. Steep increases in their relative abundances (>10-20%) correspond to the mean interannual location of the winter polynya corroborating previously obtained results from the Laptev Sea.
Project(s):
Siberian River Run-Off (SIRRO)
Coverage:
Median Latitude: 73.690465 * Median Longitude: 78.398696 * South-bound Latitude: 71.108433 * West-bound Longitude: 72.662000 * North-bound Latitude: 76.961783 * East-bound Longitude: 85.763217
Date/Time Start: 1997-09-14T09:59:00 * Date/Time End: 2000-09-20T10:41:00
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 0.0 m
Event(s):
BP00-02 * Latitude: 75.401900 * Longitude: 74.003283 * Date/Time: 2000-09-04T05:53:00 * Elevation: -49.6 m * Location: Kara Sea * Campaign: BP00 * Basis: Akademik Boris Petrov * Method/Device: Multiple investigations (MULT)
BP00-05 * Latitude: 75.837000 * Longitude: 81.005333 * Date/Time: 2000-09-06T04:20:00 * Elevation: -50.0 m * Location: Kara Sea * Campaign: BP00 * Basis: Akademik Boris Petrov * Method/Device: Multiple investigations (MULT) * Comment: CTD/RS/bucket/plankton net/large volume sampler/epibenthos sledge
BP00-07 * Latitude: 74.657600 * Longitude: 81.141100 * Date/Time: 2000-09-07T06:22:00 * Elevation: -38.0 m * Location: Kara Sea * Campaign: BP00 * Basis: Akademik Boris Petrov * Method/Device: Multiple investigations (MULT) * Comment: CTD/RS/bucket/plankton net/large volume sampler/benthos dredge/epibenthos sledge
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Salinity | Sal | Polyakova, Ye I | |||
| 4 | Diatoms freshwater | Diatom fw | % | Polyakova, Ye I |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
124 data points