Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters
The rapidly changing East Siberian Arctic Shelf (ESAS) receives large amounts of terrestrial organic carbon (OC) from coastal erosion and Russian-Arctic rivers. Climate warming increases thawing of coastal Ice Complex Deposits (ICD) and can change both the amount of released OC, as well as its prope...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | https://research.vu.nl/en/publications/165e70de-036c-44e1-85af-8b97ab1b84e2 https://doi.org/10.1002/2014JC010261 https://hdl.handle.net/1871.1/165e70de-036c-44e1-85af-8b97ab1b84e2 http://www.scopus.com/inward/record.url?scp=84921517878&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84921517878&partnerID=8YFLogxK |
id |
ftvuamstcris:oai:research.vu.nl:publications/165e70de-036c-44e1-85af-8b97ab1b84e2 |
---|---|
record_format |
openpolar |
spelling |
ftvuamstcris:oai:research.vu.nl:publications/165e70de-036c-44e1-85af-8b97ab1b84e2 2024-04-28T08:04:27+00:00 Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters Vonk, Jorien E. Semiletov, Igor P. Dudarev, Oleg V. Eglinton, Timothy I. Andersson, August Shakhova, Natalia Charkin, Alexander Heim, Birgit Gustafsson, Örjan 2014-12-29 https://research.vu.nl/en/publications/165e70de-036c-44e1-85af-8b97ab1b84e2 https://doi.org/10.1002/2014JC010261 https://hdl.handle.net/1871.1/165e70de-036c-44e1-85af-8b97ab1b84e2 http://www.scopus.com/inward/record.url?scp=84921517878&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84921517878&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/165e70de-036c-44e1-85af-8b97ab1b84e2 info:eu-repo/semantics/restrictedAccess Vonk , J E , Semiletov , I P , Dudarev , O V , Eglinton , T I , Andersson , A , Shakhova , N , Charkin , A , Heim , B & Gustafsson , Ö 2014 , ' Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters ' , Journal of Geophysical Research. Oceans , vol. 119 , no. 12 , pp. 8410-8421 . https://doi.org/10.1002/2014JC010261 Biomarkers Carbon Permafrost Radiocarbon /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2014 ftvuamstcris https://doi.org/10.1002/2014JC010261 2024-04-02T17:36:35Z The rapidly changing East Siberian Arctic Shelf (ESAS) receives large amounts of terrestrial organic carbon (OC) from coastal erosion and Russian-Arctic rivers. Climate warming increases thawing of coastal Ice Complex Deposits (ICD) and can change both the amount of released OC, as well as its propensity to be converted to greenhouse gases (fueling further global warming) or to be buried in coastal sediments. This study aimed to unravel the susceptibility to degradation, and transport and dispersal patterns of OC delivered to the ESAS. Bulk and molecular radiocarbon analyses on surface particulate matter (PM), sinking PM and underlying surface sediments illustrate the active release of old OC from coastal permafrost. Molecular tracers for recalcitrant soil OC showed ages of 3.4-13 14 C-ky in surface PM and 5.5-18 14 C-ky in surface sediments. The age difference of these markers between surface PM and surface sediments is larger (i) in regions with low OC accumulation rates, suggesting a weaker exchange between water column and sediments, and (ii) with increasing distance from the Lena River, suggesting preferential settling of fluvially derived old OC nearshore. A dual-carbon end-member mixing model showed that (i) contemporary terrestrial OC is dispersed mainly by horizontal transport while being subject to active degradation, (ii) marine OC is most affected by vertical transport and also actively degraded in the water column, and (iii) OC from ICD settles rapidly and dominates surface sediments. Preferential burial of ICD-OC released into ESAS coastal waters might therefore lower the suggested carbon cycle climate feedback from thawing ICD permafrost. Article in Journal/Newspaper Arctic Arctic Global warming Ice lena river permafrost Vrije Universiteit Amsterdam (VU): Research Portal Journal of Geophysical Research: Oceans 119 12 8410 8421 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Biomarkers Carbon Permafrost Radiocarbon /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Biomarkers Carbon Permafrost Radiocarbon /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Vonk, Jorien E. Semiletov, Igor P. Dudarev, Oleg V. Eglinton, Timothy I. Andersson, August Shakhova, Natalia Charkin, Alexander Heim, Birgit Gustafsson, Örjan Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters |
topic_facet |
Biomarkers Carbon Permafrost Radiocarbon /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
The rapidly changing East Siberian Arctic Shelf (ESAS) receives large amounts of terrestrial organic carbon (OC) from coastal erosion and Russian-Arctic rivers. Climate warming increases thawing of coastal Ice Complex Deposits (ICD) and can change both the amount of released OC, as well as its propensity to be converted to greenhouse gases (fueling further global warming) or to be buried in coastal sediments. This study aimed to unravel the susceptibility to degradation, and transport and dispersal patterns of OC delivered to the ESAS. Bulk and molecular radiocarbon analyses on surface particulate matter (PM), sinking PM and underlying surface sediments illustrate the active release of old OC from coastal permafrost. Molecular tracers for recalcitrant soil OC showed ages of 3.4-13 14 C-ky in surface PM and 5.5-18 14 C-ky in surface sediments. The age difference of these markers between surface PM and surface sediments is larger (i) in regions with low OC accumulation rates, suggesting a weaker exchange between water column and sediments, and (ii) with increasing distance from the Lena River, suggesting preferential settling of fluvially derived old OC nearshore. A dual-carbon end-member mixing model showed that (i) contemporary terrestrial OC is dispersed mainly by horizontal transport while being subject to active degradation, (ii) marine OC is most affected by vertical transport and also actively degraded in the water column, and (iii) OC from ICD settles rapidly and dominates surface sediments. Preferential burial of ICD-OC released into ESAS coastal waters might therefore lower the suggested carbon cycle climate feedback from thawing ICD permafrost. |
format |
Article in Journal/Newspaper |
author |
Vonk, Jorien E. Semiletov, Igor P. Dudarev, Oleg V. Eglinton, Timothy I. Andersson, August Shakhova, Natalia Charkin, Alexander Heim, Birgit Gustafsson, Örjan |
author_facet |
Vonk, Jorien E. Semiletov, Igor P. Dudarev, Oleg V. Eglinton, Timothy I. Andersson, August Shakhova, Natalia Charkin, Alexander Heim, Birgit Gustafsson, Örjan |
author_sort |
Vonk, Jorien E. |
title |
Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters |
title_short |
Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters |
title_full |
Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters |
title_fullStr |
Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters |
title_full_unstemmed |
Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters |
title_sort |
preferential burial of permafrost-derived organic carbon in siberian-arctic shelf waters |
publishDate |
2014 |
url |
https://research.vu.nl/en/publications/165e70de-036c-44e1-85af-8b97ab1b84e2 https://doi.org/10.1002/2014JC010261 https://hdl.handle.net/1871.1/165e70de-036c-44e1-85af-8b97ab1b84e2 http://www.scopus.com/inward/record.url?scp=84921517878&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=84921517878&partnerID=8YFLogxK |
genre |
Arctic Arctic Global warming Ice lena river permafrost |
genre_facet |
Arctic Arctic Global warming Ice lena river permafrost |
op_source |
Vonk , J E , Semiletov , I P , Dudarev , O V , Eglinton , T I , Andersson , A , Shakhova , N , Charkin , A , Heim , B & Gustafsson , Ö 2014 , ' Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters ' , Journal of Geophysical Research. Oceans , vol. 119 , no. 12 , pp. 8410-8421 . https://doi.org/10.1002/2014JC010261 |
op_relation |
https://research.vu.nl/en/publications/165e70de-036c-44e1-85af-8b97ab1b84e2 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2014JC010261 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
12 |
container_start_page |
8410 |
op_container_end_page |
8421 |
_version_ |
1797575112466104320 |