Data Description

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Citation:
Boucsein, B et al. (1999): Total organic carbon in surface sediments of the Ob and Yenisei estuaries and adjacent coastal areas, appendix 1. doi:10.1594/PANGAEA.57448,
Supplement to: Boucsein, Bettina; Fahl, Kirsten; Siebold, Martina; Stein, Ruediger (1999): Quantity and quality of organic carbon in surface sediments of the Ob and Yenisei estuaries and adjacent coastal areas: marine productivity vs. terrigenous input. In: Matthiessen, J; Stepanets, O V; Stein, R; Fütterer, D K & Galimov, E M (eds.), The Kara Sea Expedition of RV Akademik Boris Petrov 1997: First Results of a Joint Russian-German Pilot Study, Reports on Polar Research, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 300, 116-126, hdl:10013/epic.10303.d001
Abstract:
Two main mechanisms are controlling the accumulation of organic matter in the sediments of the Kara Sea. The large rivers Ob and Yenisei supply significant quantities of freshwater onto the shelf (Lisitsyn and Vinogradov, 1995; Bobrovitskaya et al., 1996; Johnson et al., 1997) and deliver terrigenous organie matter and aquatic algae. Additionally, marine organic matter is produced in the water column.
In order to distinguish between the different sources of the organic material maceral analysis, organic-geochemical bulk Parameters and biomarkers (short- and long-chain D-alkanes, fatty acids and pigments) were used to determine the quality (marine vs. terrigenous) and quantity of the organic carbon fraction in the surface sediments taken during the 28th cruise of RV Akademik Boris Petrov (Matthiessen and Stepanets, 1998) (Fig. 1). Previous organic-geochemical investigations (i.e., total organic-carbon content (TOC), hydrogen indices (Hl), CIN-ratios) indicate the importance of terrigenous input of organic matter (Galimov et al., 1996; Stein, 1996). Studies of lipid biomarkers in surface sediments in the Ob estuary show also a predominance of terrestrial constituents and an increase in planktonogenic and bacterial lipids further offshore (Belyaeva and Eglinton, 1997).
In complex systems such as the Eurasian continental margin characterized by high input of terrestriallaquatic organic matter and strong seasonal variation in sea-ice Cover and primary productivity, the Interpretation of the organic geochemical data is much more complicated and restricted in comparison to similar data Sets from low-latitude open-ocean environments (Fahl and Stein, 1998). Microscopical studies (maceral analysisl palynology), however, allow a direct visual inspection of the particulate organic matter and allow to differentiate particles of different biological sources. Thus, a combination of both methods as shown in this study, yields a more precise identification of organic-carbon sources.
Project(s):
Coverage:
Median Latitude: 73.239944 * Median Longitude: 76.674706 * South-bound Latitude: 72.093160 * West-bound Longitude: 72.662000 * North-bound Latitude: 74.000667 * East-bound Longitude: 82.813333
Date/Time Start: 1997-09-13T09:08:00 * Date/Time End: 1997-09-25T11:18:00
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 0.0 m
Event(s):
BP97-01 * * Latitude: 73.910500 * Longitude: 73.183000 * Date/Time: 1997-09-13T09:08:00 * Elevation: -31.0 m * Location: Kara Sea * * Campaign: BP97 (KaraSea97) * * Basis: Akademik Boris Petrov * * Device: Sampling gear, diverse * * Comment: CTD-1,PN-4,PHN-1,RS-3,LVS-3,OG-3,LBC-3,MUC-1,GC500-1,BD-1,UWR-1
BP97-10 * * Latitude: 72.502833 * Longitude: 74.080833 * Date/Time: 1997-09-14T09:59:00 * Elevation: -15.0 m * Location: Kara Sea * * Campaign: BP97 (KaraSea97) * * Basis: Akademik Boris Petrov * * Device: Sampling gear, diverse * * Comment: CTD-1,PN-4,PHN-1,RS-3,LVS-3,OG-3,LBS-3,MUC-2,GC500-1,BD-1
BP97-12 * * Latitude: 72.170333 * Longitude: 74.293667 * Date/Time: 1997-09-15T01:06:00 * Elevation: -13.0 m * Location: Kara Sea * * Campaign: BP97 (KaraSea97) * * Basis: Akademik Boris Petrov * * Device: Sampling gear, diverse * * Comment: CTD-1,RS-3,LVS-3,OG-3,LBC-1,MUC-2
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Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventMetadata
2LATITUDE *LatitudeGeocode
3LONGITUDE *LongitudeGeocode
4Elevation of eventElevationmMetadata
5DEPTH, sediment/rock *DepthmGeocode
6Nitrogen, total *TN%Stein, Ruediger *Element analyser CHN *
7Carbon/Nitrogen ratio *C/NStein, Ruediger *Calculated *
8Calcium carbonate *CaCO3%Stein, Ruediger *Element analyser CHN *
9Carbon, organic, total *TOC%Stein, Ruediger *Element analyser CHN *
10Hydrogen index, mass HC per unit mass total organic carbon *HI, HC/TOCmg/gStein, Ruediger *Rock eval pyrolysis (Behar et al., 2001) *
11Oxygen index, mass CO2 per unit mass total organic carbon *OI, CO2/TOCmg/gStein, Ruediger *Rock eval pyrolysis (Behar et al., 2001) *
12Pyrolysis temperature maximum *TmaxCStein, Ruediger *Rock eval pyrolysis (Behar et al., 2001) *
License:
Size:
147 data points

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