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. Bulk geochemical (C : N ratio and stable carbon isotopic composition) parameters s...
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crwiley:10.4319/lo.2011.56.4.1463 2024-06-23T07:49:35+00:00 Large ancient organic matter contributions to Arctic marine sediments (Svalbard) Kim, J.-H. Peterse, F. Willmott, V. Kristensen, D. Klitgaard Baas, M. Schouten, S. Sinninghe Damsté, J. S. 2011 http://dx.doi.org/10.4319/lo.2011.56.4.1463 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2011.56.4.1463 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2011.56.4.1463 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 56, issue 4, page 1463-1474 ISSN 0024-3590 1939-5590 journal-article 2011 crwiley https://doi.org/10.4319/lo.2011.56.4.1463 2024-06-06T04:21:37Z 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 (Δ 14 C 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 Ålesund, previously a coal‐mining town, indicated that input of IRD‐derived OM was predominantly responsible for the generally low Δ 14 C value. We applied three‐end‐member models based on Δ 14 C 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. Article in Journal/Newspaper Arctic glacier Kongsfjord* Krossfjord* Ny Ålesund Ny-Ålesund Svalbard Wiley Online Library Arctic Kongsfjord ENVELOPE(29.319,29.319,70.721,70.721) Kongsvegen ENVELOPE(12.657,12.657,78.854,78.854) Ny-Ålesund Svalbard Limnology and Oceanography 56 4 1463 1474 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
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. 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 (Δ 14 C 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 Ålesund, previously a coal‐mining town, indicated that input of IRD‐derived OM was predominantly responsible for the generally low Δ 14 C value. We applied three‐end‐member models based on Δ 14 C 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. |
format |
Article in Journal/Newspaper |
author |
Kim, J.-H. Peterse, F. Willmott, V. Kristensen, D. Klitgaard Baas, M. Schouten, S. Sinninghe Damsté, J. S. |
spellingShingle |
Kim, J.-H. Peterse, F. Willmott, V. Kristensen, D. Klitgaard 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. Kristensen, D. Klitgaard 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) |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.4319/lo.2011.56.4.1463 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2011.56.4.1463 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2011.56.4.1463 |
long_lat |
ENVELOPE(29.319,29.319,70.721,70.721) ENVELOPE(12.657,12.657,78.854,78.854) |
geographic |
Arctic Kongsfjord Kongsvegen Ny-Ålesund Svalbard |
geographic_facet |
Arctic Kongsfjord Kongsvegen Ny-Ålesund Svalbard |
genre |
Arctic glacier Kongsfjord* Krossfjord* Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Arctic glacier Kongsfjord* Krossfjord* Ny Ålesund Ny-Ålesund Svalbard |
op_source |
Limnology and Oceanography volume 56, issue 4, page 1463-1474 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2011.56.4.1463 |
container_title |
Limnology and Oceanography |
container_volume |
56 |
container_issue |
4 |
container_start_page |
1463 |
op_container_end_page |
1474 |
_version_ |
1802640063398412288 |