Not logged in
Data Publisher for Earth & Environmental Science

Dubinenkov, Ivan; Flerus, Ruth; Schmitt-Kopplin, Philippe; Kattner, Gerhard; Koch, Boris P (2014): Dissolved organic matter in the Lena Delta in 2009. doi:10.1594/PANGAEA.831765,
Supplement to: Dubinenkov, I et al. (2014): Origin-specific molecular signatures of dissolved organic matter in the Lena Delta. Biogeochemistry, 123(1-2), 1-14, doi:10.1007/s10533-014-0049-0

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Large Arctic rivers discharge significant amounts of dissolved organic matter (DOM) into the Arctic Ocean. We sampled natural waters of the Lena River, the Buor-Khaya Bay (Laptev Sea), permafrost melt water creeks, ice complex melt water creeks and a lake. The goal of this study was to characterize the molecular DOM composition with respect to different water bodies within the Lena Delta. We aimed at an identification of source-specific DOM molecular markers and their relative contribution to DOM of different origin. The molecular characterization was performed for solid-phase extracted DOM by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Average dissolved organic carbon concentrations in the original samples were 490±75 µmol C/L for riverine and bay samples and 399±115 µmol C/L for permafrost melt water creeks. Average TDN concentrations were elevated in the permafrost melt waters (19.7±7.1 µmol N/L) in comparison to the river and the bay (both 13.2±2.6 µmol N/L). FT-ICR MS and statistical tools demonstrated that the origin of DOM in the Lena Delta was systematically reflected in its molecular composition. Magnitude weighted parameters calculated from MS data (O/Cwa, H/Cwa, C/Nwa) highlighted preliminary sample discrimination. The highest H/Cwa of 1.315 was found for DOM in melt water creeks in comparison to 1.281 for river and 1.230 for the bay samples. In the bay samples we observed a higher fraction of oxygen-rich components which was reflected in an O/Cwa ratio of 0.445 in comparison to 0.425 and 0.427 in the river and creeks, respectively. From the southernmost location to the bay a relative depletion of nitrogenous molecular markers and an enrichment of oxidized DOM components occurred. The highest contribution of nitrogenous components was indicative for creeks reflected in a C/Nwa of 104 in comparison to 143 and 176 in the river and bay, respectively. These observations were studied on a molecular formula level using principal component and indicator value analyses. The results showed systematic differences with respect to water origin and constitute an important basis for a better mechanistic understanding of DOM transformations in the changing Arctic rivers.
Median Latitude: 72.239065 * Median Longitude: 127.359588 * South-bound Latitude: 71.575000 * West-bound Longitude: 125.285580 * North-bound Latitude: 72.700220 * East-bound Longitude: 130.290000
Date/Time Start: 2009-08-14T11:30:00 * Date/Time End: 2009-08-23T15:50:00
Minimum DEPTH, water: m * Maximum DEPTH, water: 12 m
LenaDelta2009 * Latitude: 72.351000 * Longitude: 127.775000 * Date/Time Start: 2009-08-14T00:00:00 * Date/Time End: 2009-08-23T00:00:00 * Location: Lena Delta, Siberia, Russia * Campaign: Lena2009 * Basis: Sampling on land * Device: Multiple investigations (MULT)
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Sample IDSample ID
3Location typeLoc type
6Depth, bathymetricBathy depthm
7DEPTH, waterDepth watermGeocode
8Carbon, organic, dissolvedDOCµmol/lKattner, GerhardHigh temperature catalytic oxidation
9Nitrogen, total dissolvedTDNµmol/lKattner, GerhardHigh temperature catalytic oxidation
391 data points

Download Data

Download dataset as tab-delimited text (use the following character encoding: )

View dataset as HTML