Large ancient organic matter contributions to Arctic marine sediments (Svalbard)
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. Bulkgeochemical (C : N ratio and stable carbon isotopic composition) parameters sug...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/309707 2023-11-12T04:11:15+01:00 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. non-UU output of UU-AW members Organic geochemistry 2011 application/pdf https://dspace.library.uu.nl/handle/1874/309707 en eng 0024-3590 https://dspace.library.uu.nl/handle/1874/309707 info:eu-repo/semantics/OpenAccess Article 2011 ftunivutrecht 2023-11-01T23:12:55Z 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. Bulkgeochemical (C : N ratio and stable carbon isotopic composition) parameters suggest a predominant marinecontribution 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 anindicator for coal-derived OM), the low carbon preference index and the average chain length of n-alkanes, andthe depleted bulk radiocarbon content (D14C value) suggest that ancient OM of both coal-derived and matureIRD-derived OM is being buried in the Kongsfjord–Krossfjord system of Svalbard in the high Arctic. Therelatively low retene concentrations in the marine surface sediments other than those in close vicinity of NyA˚lesund, previously a coal-mining town, indicated that input of IRD-derived OM was predominantly responsiblefor the generally low D14C value. We applied three-end-member models based on D14C and retene and n-alkaneconcentration data to disentangle relative coal-derived, IRD-derived, and marine OM proportions to sedimentaryOM. Sediments were comprised on average 2% 6 4% of coal-derived OM, 37% 6 17% of IRD-derived OM, and61% 6 18% of marine OM with higher IRD-derived OM deposit in the Kongsvegen glacier front. Our resultshighlight the important role of ancient OM on carbon dynamics in Arctic environments, in particular for benthicfood webs. Article in Journal/Newspaper Arctic glacier Kongsfjord* Krossfjord* Svalbard Utrecht University Repository Arctic Kongsfjord ENVELOPE(29.319,29.319,70.721,70.721) Kongsvegen ENVELOPE(12.657,12.657,78.854,78.854) Lesund ENVELOPE(8.470,8.470,63.331,63.331) Svalbard |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
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. Bulkgeochemical (C : N ratio and stable carbon isotopic composition) parameters suggest a predominant marinecontribution 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 anindicator for coal-derived OM), the low carbon preference index and the average chain length of n-alkanes, andthe depleted bulk radiocarbon content (D14C value) suggest that ancient OM of both coal-derived and matureIRD-derived OM is being buried in the Kongsfjord–Krossfjord system of Svalbard in the high Arctic. Therelatively low retene concentrations in the marine surface sediments other than those in close vicinity of NyA˚lesund, previously a coal-mining town, indicated that input of IRD-derived OM was predominantly responsiblefor the generally low D14C value. We applied three-end-member models based on D14C and retene and n-alkaneconcentration data to disentangle relative coal-derived, IRD-derived, and marine OM proportions to sedimentaryOM. Sediments were comprised on average 2% 6 4% of coal-derived OM, 37% 6 17% of IRD-derived OM, and61% 6 18% of marine OM with higher IRD-derived OM deposit in the Kongsvegen glacier front. Our resultshighlight the important role of ancient OM on carbon dynamics in Arctic environments, in particular for benthicfood webs. |
author2 |
non-UU output of UU-AW members Organic geochemistry |
format |
Article in Journal/Newspaper |
author |
Kim, J.-H. Peterse, F. Willmott, V. Klitgaard Kristensen, D. Baas, M. Schouten, S. Sinninghe Damsté, J.S. |
spellingShingle |
Kim, J.-H. Peterse, F. Willmott, V. Klitgaard Kristensen, D. Baas, M. Schouten, S. Sinninghe Damsté, J.S. Large ancient organic matter contributions to Arctic marine sediments (Svalbard) |
author_facet |
Kim, J.-H. Peterse, F. Willmott, V. Klitgaard Kristensen, D. Baas, M. Schouten, S. Sinninghe Damsté, J.S. |
author_sort |
Kim, J.-H. |
title |
Large ancient organic matter contributions to Arctic marine sediments (Svalbard) |
title_short |
Large ancient organic matter contributions to Arctic marine sediments (Svalbard) |
title_full |
Large ancient organic matter contributions to Arctic marine sediments (Svalbard) |
title_fullStr |
Large ancient organic matter contributions to Arctic marine sediments (Svalbard) |
title_full_unstemmed |
Large ancient organic matter contributions to Arctic marine sediments (Svalbard) |
title_sort |
large ancient organic matter contributions to arctic marine sediments (svalbard) |
publishDate |
2011 |
url |
https://dspace.library.uu.nl/handle/1874/309707 |
long_lat |
ENVELOPE(29.319,29.319,70.721,70.721) ENVELOPE(12.657,12.657,78.854,78.854) ENVELOPE(8.470,8.470,63.331,63.331) |
geographic |
Arctic Kongsfjord Kongsvegen Lesund Svalbard |
geographic_facet |
Arctic Kongsfjord Kongsvegen Lesund Svalbard |
genre |
Arctic glacier Kongsfjord* Krossfjord* Svalbard |
genre_facet |
Arctic glacier Kongsfjord* Krossfjord* Svalbard |
op_relation |
0024-3590 https://dspace.library.uu.nl/handle/1874/309707 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782330420598145024 |