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Galimov, Erik M; Kodina, Ludmilla A; Stepanets, Oleg V; Korobeinik, G S (2009): Chemical and isotopic compositions of water, particulates, plankton, gases, sediments, and minerals from the Kara Sea and lower Ob and Yenisei Rivers [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.726415, Supplement to: Galimov, EM et al. (2006): Biogeochemistry of the Russian Arctic. Kara Sea: Research results under the SIRRO Project, 1995–2003. Geochemistry International, 44(11), 1053-1104, https://doi.org/10.1134/S0016702906110012

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Abstract:
The Kara Sea is an area uniquely suitable for studying processes in the river-sea system. This is a shallow sea, into which two great Siberian rivers, Yenisei and Ob, flow. From 1995 to 2003, the sea was studied by six international expeditions onboard the R/V Akademik Boris Petrov. This publication summarizes the results obtained, within the framework of this project, at the Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences. Various hydrogeochemical parameters, concentrations and isotopic composition of organic and carbonate carbon of the sediments, plankton, particulate organic matter, hydrocarbons, and dissolved CO2 were examined throughout the whole sea area at more than 200 sites. The d13C varies from -22 and -24 per mil where Atlantic waters enter the Kara Sea and in the north-eastern part of the water area to -27 per mil in the Yenisei and Ob estuaries. The value of d13C of the plankton is only weakly correlated with the d13C of the organic matter from the sediments and is lower by as much as 3-4 per mil. The paper presents the results obtained from a number of meridional river-sea profiles. It was determined from the relations between the isotopic compositions of plankton and particulate matter that the river waters carry material consisting of 70% detrital-humus matter and 30% planktonogenic material in the river part, and the material contained in the offshore waters consists of 30% terrigenous components, with the contribution of bioproducers amounting to 70%. The carbon isotopic composition of the plankton ranges from -29 to -35 per mil in the riverine part, from -28 to -27 per mil in the estuaries, and from -27.0 to -25 per mil in the marine part. The relative lightness of the carbon isotopic composition of plankton in Arctic waters is explained by the temperature effect, elevated CO2 concentrations, and long-distance CO2 supply to the sea with river waters. The data obtained on the isotopic composition of CO2 in the surface waters of the Kara Sea were used to map the distribution of d13C. The complex of hydrocarbon gases extracted from the waters included methane, C2-C5, and unsaturated C2=-C4= hydrocarbons, for which variations in the concentrations in the waters were studied along river-estuary-sea profiles. The geochemistry of hydrocarbon gases in surface fresh waters is characterized by comparable concentrations of methane (0.3-5 µl/l) and heavier hydrocarbons, including unsaturated ones. Microbiological methane with d13C from -105 to -90 per mil first occurs in the sediments at depths of 40-200 cm. The sediments practically everywhere display traces of methane oxidation in the form of a shift of the d13C of methane toward higher values and the occurrence of autogenic carbonate material, including ikaite, enriched in the light isotope. Ikaite (d13C from -25 to -60 per mil) was found and examined in several profiles. The redox conditions in the sediments varied from normal in the southern part of the sea to highly oxidized along the Novaya Zemlya Trough. Vertical sections through the sediments of the latter exemplify the complete suppression of the biochemical activity of microorganisms. Our data provide insight into the biogeochemistry of the Kara Sea and make it possible to specify the background values needed for ecological control during the future exploration operations and extraction of hydrocarbons in the Kara Sea.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 74.089434 * Median Longitude: 78.842053 * South-bound Latitude: 68.667900 * West-bound Longitude: 53.600000 * North-bound Latitude: 77.922800 * East-bound Longitude: 89.338300
Date/Time Start: 1997-09-13T09:08:00 * Date/Time End: 2003-08-20T15:50:00
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)
BP00-03 * Latitude: 76.925617 * Longitude: 74.775033 * Date/Time: 2000-09-05T04:38:00 * Elevation: -193.0 m * Location: Kara Sea * Campaign: BP00 * Basis: Akademik Boris Petrov * Method/Device: Bucket water sampling (BUCKET) * Comment: bucket
BP00-04 * Latitude: 76.416483 * Longitude: 81.008100 * Date/Time: 2000-09-05T16:22:00 * Elevation: -54.0 m * Location: Kara Sea * Campaign: BP00 * Basis: Akademik Boris Petrov * Method/Device: Multiple investigations (MULT) * Comment: CTD/RS/bucket/plankton net/large volume sampler
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
26 datasets

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Datasets listed in this publication series

  1. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 1) Hydrochemical parameters of waters along the Yenisei River - Kara Sea profile of August 2001. https://doi.org/10.1594/PANGAEA.726060
  2. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 3) Isotopic composition of C from bicarbonate ions dissolved in water of the Kara Sea, data of September 2000. https://doi.org/10.1594/PANGAEA.726062
  3. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 3) Isotopic composition of C from bicarbonate ions dissolved in water of the Kara Sea, data of August-September 2001. https://doi.org/10.1594/PANGAEA.726063
  4. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 3) Isotopic composition of C from bicarbonate ions dissolved in water of the Kara Sea, data of 1995. https://doi.org/10.1594/PANGAEA.726064
  5. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 3) Isotopic composition of C from bicarbonate ions dissolved in water of the Kara Sea, data of September 1997. https://doi.org/10.1594/PANGAEA.726065
  6. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 3) Isotopic composition of C from bicarbonate ions dissolved in water of the Kara Sea, data of August-September 1999. https://doi.org/10.1594/PANGAEA.726066
  7. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 4) Composition of phytoplankton and carbon isotopic composition of plankton and dissolved bicarbonate ions from the subsurface water layer along the Yenisei River - Kara Sea meridional profile (70-77° N), September 7-22, 2000. https://doi.org/10.1594/PANGAEA.726068
  8. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 5) Composition of phytoplankton and carbon isotopic composition of plankton and dissolved bicarbonate ions from the surface water layer along the Yenisei River - Kara Sea meridional profile (70-78° N), August 16-30, 2001. https://doi.org/10.1594/PANGAEA.726069
  9. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 6) Composition of phytoplankton and carbon isotopic composition of plankton and dissolved bicarbonate ions from the surface water layer along the Ob River - Kara Sea meridional profile (69-78° N), August 31 - September 10, 2001. https://doi.org/10.1594/PANGAEA.726070
  10. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 7) Composition of phytoplankton and carbon isotopic composition of plankton and dissolved bicarbonate ions from the surface water layer along the Ob River - Kara Sea meridional profile (69-76° N), September 30 - October 8, 2002. https://doi.org/10.1594/PANGAEA.726073
  11. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 9) Concentrations and isotopic compositions of particulate and dissolved carbon in waters of the Ob estuarine zone adjacent to the Kara Sea, Ob River - Kara Sea profile, September 1997. https://doi.org/10.1594/PANGAEA.726150
  12. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 9) Concentrations and isotopic compositions of particulate and dissolved carbon in waters of the Yenisei estuarine zone adjacent to the Kara Sea, Yenisei River - Kara Sea profile, September 1997. https://doi.org/10.1594/PANGAEA.726155
  13. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 10) Concentrations and isotopic compositions of particulate organic carbon from water samples collected along the Yenisei River - Kara Sea profile, September 2000. https://doi.org/10.1594/PANGAEA.726156
  14. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 11) Isotopic composition of particulate organic carbon from surface waters along the Ob River - Kara Sea meridional profile, samples of 2000. https://doi.org/10.1594/PANGAEA.726157
  15. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 11) Isotopic composition of particulate organic carbon from surface waters along the Yenisei River - Kara Sea meridional profile, samples of 2000. https://doi.org/10.1594/PANGAEA.726158
  16. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 12) Organic carbon contents and isotopic composition in bottom sediments from the Kara Sea. https://doi.org/10.1594/PANGAEA.726164
  17. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 13) Variations in isotopic composition of organic carbon in plankton, in particulate matter of the vertical section of waters, and in surface sediments along the Ob River - Kara Sea profile. https://doi.org/10.1594/PANGAEA.726165
  18. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 13) Variations in isotopic composition of organic carbon in plankton, in particulate matter of the vertical section of waters, and in surface sediments along the Yenisei River - Kara Sea profile. https://doi.org/10.1594/PANGAEA.726166
  19. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 14) Concentrations of hydrocarbon gases in waters along the Yenisei River - Kara Sea meridional profile. https://doi.org/10.1594/PANGAEA.726167
  20. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 15) Distribution of hydrocarbon gases in the vertical section of waters in the Yenisei River - Kara Sea system, September 2000. https://doi.org/10.1594/PANGAEA.726169
  21. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 16) Distribution of methane and its higher homologues in waters of the Yenisei River - Kara Sea profile, August 14 to September 11, 2001. https://doi.org/10.1594/PANGAEA.726170
  22. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 17) Distribution of methane and its higher homologues in waters of the Ob River - Kara Sea profile, August 14 to September 11, 2001. https://doi.org/10.1594/PANGAEA.726268
  23. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 18) Concentrations of methane and higher hydrocarbons in sediments at sites along the Yenisei River - Kara Sea profile, sample collection of 2000 and 2001. https://doi.org/10.1594/PANGAEA.726269
  24. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 19) Methane isotopic composition in sediments from the Kara Sea. https://doi.org/10.1594/PANGAEA.726270
  25. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 20) Carbon isotopic composition of authigenic carbonates (minerals, nodules, and crusts) in sediments from the Kara Sea. https://doi.org/10.1594/PANGAEA.726272
  26. Galimov, EM; Kodina, LA; Stepanets, OV et al. (2006): (Table 21) Concentrations of radionuclides in Kara Sea waters, after filtration, and after ultrafiltration. https://doi.org/10.1594/PANGAEA.726273