Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Large ancient organic matter contributions to Arctic marine sediments (Svalbard)
Kim, J.-H.; Peterse, F.; Willmott, V.; Klitgaard Kristensen, D.; Baas, M.; Schouten, S.; Sinninghe Damsté, J.S. (2011). Large ancient organic matter contributions to Arctic marine sediments (Svalbard). Limnol. Oceanogr. 56(4): 1463-1474. dx.doi.org/10.4319/lo.2011.56.4.1463
In: Limnology and Oceanography. American Society of Limnology and Oceanography: Waco, Tex., etc. ISSN 0024-3590; e-ISSN 1939-5590, meer
|   |
| Auteurs | | Top |
- Kim, J.-H.
- Peterse, F.
- Willmott, V.
- Klitgaard Kristensen, D.
|
- Baas, M.
- Schouten, S.
- Sinninghe Damsté, J.S.
|
|
| Abstract |
Soils, fine-grained ice-rafted detritus (IRD), coals, and marine surface sediments in the Arctic realm (Svalbard) were collected in 2007 and 2008 to characterize organic matter (OM) sources in Arctic marine sediments. Bulk geochemical (C : N ratio and stable carbon isotopic composition) parameters suggest a predominant marine contribution to sedimentary OM. The branched and isoprenoid tetraether index (a proxy of soil OM input) indicates that soil OM contribution to the marine sediments is minor. However, the presence of retene (used as an indicator for coal-derived OM), the low carbon preference index and the average chain length of n-alkanes, and the depleted bulk radiocarbon content (Delta C-14 value) suggest that ancient OM of both coal-derived and mature IRD-derived OM is being buried in the Kongsfjord-Krossfjord system of Svalbard in the high Arctic. The relatively low retene concentrations in the marine surface sediments other than those in close vicinity of Ny Alesund, previously a coal-mining town, indicated that input of IRD-derived OM was predominantly responsible for the generally low Delta C-14 value. We applied three-end-member models based on Delta C-14 and retene and n-alkane concentration data to disentangle relative coal-derived, IRD-derived, and marine OM proportions to sedimentary OM. Sediments were comprised on average 2% +/- 4% of coal-derived OM, 37% +/- 17% of IRD-derived OM, and 61% +/- 18% of marine OM with higher IRD-derived OM deposit in the Kongsvegen glacier front. Our results highlight the important role of ancient OM on carbon dynamics in Arctic environments, in particular for benthic food webs. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
