A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk
High-latitude regions are underlain by the most organic carbon (OC)-rich soils on earth and currently subject to intense climate warming, potentially increasing remobilization and mineralization of soil OC. Sub-Arctic Scandinavia is located on the 0C mean annual isotherm and is therefore particularl...
Published in: | Journal of Geophysical Research: Biogeosciences |
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2012
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Online Access: | https://research.vu.nl/en/publications/ff8c7dcb-b68e-45ba-ae26-7a1d98a089f8 https://doi.org/10.1029/2011JG001887 http://hdl.handle.net/1871.1/ff8c7dcb-b68e-45ba-ae26-7a1d98a089f8 http://www.scopus.com/inward/record.url?scp=84865379567&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84865379567&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/ff8c7dcb-b68e-45ba-ae26-7a1d98a089f8 2023-05-15T14:57:50+02:00 A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk Vonk, Jorien E. Alling, Vanja Rahm, Lars Mrth, Carl Magnus Humborg, Christoph Gustafsson, Örjan 2012-09-01 https://research.vu.nl/en/publications/ff8c7dcb-b68e-45ba-ae26-7a1d98a089f8 https://doi.org/10.1029/2011JG001887 http://hdl.handle.net/1871.1/ff8c7dcb-b68e-45ba-ae26-7a1d98a089f8 http://www.scopus.com/inward/record.url?scp=84865379567&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84865379567&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Vonk , J E , Alling , V , Rahm , L , Mrth , C M , Humborg , C & Gustafsson , Ö 2012 , ' A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk ' , Journal of Geophysical Research , vol. 117 , no. 3 , G03018 . https://doi.org/10.1029/2011JG001887 article 2012 ftvuamstcris https://doi.org/10.1029/2011JG001887 2022-01-17T13:27:25Z High-latitude regions are underlain by the most organic carbon (OC)-rich soils on earth and currently subject to intense climate warming, potentially increasing remobilization and mineralization of soil OC. Sub-Arctic Scandinavia is located on the 0C mean annual isotherm and is therefore particularly vulnerable to climate change. This study aimed to establish a baseline for soil OC release over the past century into Lake Tornetrsk, the largest lake in sub-Arctic Scandinavia, through bulk geochemical and molecular radiocarbon analyses in chronologically constrained sediment cores. Our results suggest a dominance of peat-derived terrestrial OC inflow. We show that the annual terrestrial OC inflow to the lake is ∼12 times higher than the in-lake produced particulate OC, and consists for a large part (ca. 60%) of old OC from deep reservoirs in the catchment. The sedimentary record shows signs of increasing inflow of more degraded terrestrial matter since ∼1975, as indicated by increasing %TOC concentrations, a lower δ 13 C value and lower TOC:TN ratios. Based on simultaneous changes in local climate and reported signs of permafrost degradation (e.g., active layer deepening, mire/peat erosion), the observed changes in the sedimentary record of Scandinavia's largest mountain lake likely reflect a climate warming-induced change in terrestrial OC inflow. Article in Journal/Newspaper Arctic Climate change permafrost Vrije Universiteit Amsterdam (VU): Research Portal Arctic Journal of Geophysical Research: Biogeosciences 117 G3 n/a n/a |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
description |
High-latitude regions are underlain by the most organic carbon (OC)-rich soils on earth and currently subject to intense climate warming, potentially increasing remobilization and mineralization of soil OC. Sub-Arctic Scandinavia is located on the 0C mean annual isotherm and is therefore particularly vulnerable to climate change. This study aimed to establish a baseline for soil OC release over the past century into Lake Tornetrsk, the largest lake in sub-Arctic Scandinavia, through bulk geochemical and molecular radiocarbon analyses in chronologically constrained sediment cores. Our results suggest a dominance of peat-derived terrestrial OC inflow. We show that the annual terrestrial OC inflow to the lake is ∼12 times higher than the in-lake produced particulate OC, and consists for a large part (ca. 60%) of old OC from deep reservoirs in the catchment. The sedimentary record shows signs of increasing inflow of more degraded terrestrial matter since ∼1975, as indicated by increasing %TOC concentrations, a lower δ 13 C value and lower TOC:TN ratios. Based on simultaneous changes in local climate and reported signs of permafrost degradation (e.g., active layer deepening, mire/peat erosion), the observed changes in the sedimentary record of Scandinavia's largest mountain lake likely reflect a climate warming-induced change in terrestrial OC inflow. |
format |
Article in Journal/Newspaper |
author |
Vonk, Jorien E. Alling, Vanja Rahm, Lars Mrth, Carl Magnus Humborg, Christoph Gustafsson, Örjan |
spellingShingle |
Vonk, Jorien E. Alling, Vanja Rahm, Lars Mrth, Carl Magnus Humborg, Christoph Gustafsson, Örjan A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk |
author_facet |
Vonk, Jorien E. Alling, Vanja Rahm, Lars Mrth, Carl Magnus Humborg, Christoph Gustafsson, Örjan |
author_sort |
Vonk, Jorien E. |
title |
A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk |
title_short |
A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk |
title_full |
A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk |
title_fullStr |
A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk |
title_full_unstemmed |
A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk |
title_sort |
centennial record of fluvial organic matter input from the discontinuous permafrost catchment of lake tornetrsk |
publishDate |
2012 |
url |
https://research.vu.nl/en/publications/ff8c7dcb-b68e-45ba-ae26-7a1d98a089f8 https://doi.org/10.1029/2011JG001887 http://hdl.handle.net/1871.1/ff8c7dcb-b68e-45ba-ae26-7a1d98a089f8 http://www.scopus.com/inward/record.url?scp=84865379567&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84865379567&partnerID=8YFLogxK |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
Vonk , J E , Alling , V , Rahm , L , Mrth , C M , Humborg , C & Gustafsson , Ö 2012 , ' A centennial record of fluvial organic matter input from the discontinuous permafrost catchment of Lake Tornetrsk ' , Journal of Geophysical Research , vol. 117 , no. 3 , G03018 . https://doi.org/10.1029/2011JG001887 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2011JG001887 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
117 |
container_issue |
G3 |
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n/a |
op_container_end_page |
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1766329940837400576 |