Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas
[1] Fluvial and erosional release processes in permafrost-dominated Eurasian Arctic cause transport of large amounts of particulate organic carbon (POC) to coastal waters. The marine fate of this terrestrial POC (terr-POC), water column degradation, burial in shelf sediments, or export to depth, imp...
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Online Access: | https://research.manchester.ac.uk/en/publications/abfc4bd2-d642-4fc2-841d-c9b1764c012e https://doi.org/10.1029/2010GB003862 |
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ftumanchesterpub:oai:pure.atira.dk:publications/abfc4bd2-d642-4fc2-841d-c9b1764c012e 2024-06-23T07:49:58+00:00 Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas Sánchez-García, Laura Alling, Vanja Pugach, Svetlana Vonk, Jorien Van Dongen, Bart Humborg, Christoph Dudarev, Oleg Semiletov, Igor Gustafsson, Örjan 2011 https://research.manchester.ac.uk/en/publications/abfc4bd2-d642-4fc2-841d-c9b1764c012e https://doi.org/10.1029/2010GB003862 eng eng https://research.manchester.ac.uk/en/publications/abfc4bd2-d642-4fc2-841d-c9b1764c012e info:eu-repo/semantics/closedAccess Sánchez-García , L , Alling , V , Pugach , S , Vonk , J , Van Dongen , B , Humborg , C , Dudarev , O , Semiletov , I & Gustafsson , Ö 2011 , ' Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas ' , Global Biogeochemical Cycles , vol. 25 , no. 2 , GB2007 . https://doi.org/10.1029/2010GB003862 article 2011 ftumanchesterpub https://doi.org/10.1029/2010GB003862 2024-06-04T00:25:54Z [1] Fluvial and erosional release processes in permafrost-dominated Eurasian Arctic cause transport of large amounts of particulate organic carbon (POC) to coastal waters. The marine fate of this terrestrial POC (terr-POC), water column degradation, burial in shelf sediments, or export to depth, impacts the potential for climate-carbon feedback. As part of the International Siberian Shelf Study (ISSS-08; August-September 2008), the POC distribution, inventory, and fate in the water column of the extensive yet poorly studied Eurasian Arctic Shelf seas were investigated. The POC concentration spanned 1-152 mM, with highest values in the SE Laptev Sea. The POC inventory was constrained for the Laptev (1.32 ± 0.09 Tg) and East Siberian seas (2.85 ± 0.20 Tg). A hydraulic residence time of 3.5 ± 2 years for these Siberian shelf seas yielded a combined annual terr-POC removal flux of 3.9 ± 1.4 Tg yr?1. Accounting for sediment burial and shelf-break exchange, the terr-POC water column degradation was ?2.5 ± 1.6 Tg yr?1, corresponding to a first-order terr-POC degradation rate constant of 1.4 ± 0.9 yr?1, which is 5-10 times faster than reported for terr-DOC degradation in the Arctic Ocean. This terr-POC degradation flux thus contributes substantially to the dissolved inorganic carbon excess of 10 Tg C observed during ISSS-08 for these waters. This evaluation suggests that extensive decay of terr-POC occurs already in the water column and contributes to outgassing of CO2. This process should be considered as a geographically dislocated carbon-climate coupling where thawing of vulnerable permafrost carbon on land is eventually adding CO2 above the ocean. Copyright 2011 by the American Geophysical Union. Article in Journal/Newspaper Arctic Arctic Ocean laptev Laptev Sea permafrost The University of Manchester: Research Explorer Arctic Arctic Ocean Laptev Sea Global Biogeochemical Cycles 25 2 n/a n/a |
institution |
Open Polar |
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The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
[1] Fluvial and erosional release processes in permafrost-dominated Eurasian Arctic cause transport of large amounts of particulate organic carbon (POC) to coastal waters. The marine fate of this terrestrial POC (terr-POC), water column degradation, burial in shelf sediments, or export to depth, impacts the potential for climate-carbon feedback. As part of the International Siberian Shelf Study (ISSS-08; August-September 2008), the POC distribution, inventory, and fate in the water column of the extensive yet poorly studied Eurasian Arctic Shelf seas were investigated. The POC concentration spanned 1-152 mM, with highest values in the SE Laptev Sea. The POC inventory was constrained for the Laptev (1.32 ± 0.09 Tg) and East Siberian seas (2.85 ± 0.20 Tg). A hydraulic residence time of 3.5 ± 2 years for these Siberian shelf seas yielded a combined annual terr-POC removal flux of 3.9 ± 1.4 Tg yr?1. Accounting for sediment burial and shelf-break exchange, the terr-POC water column degradation was ?2.5 ± 1.6 Tg yr?1, corresponding to a first-order terr-POC degradation rate constant of 1.4 ± 0.9 yr?1, which is 5-10 times faster than reported for terr-DOC degradation in the Arctic Ocean. This terr-POC degradation flux thus contributes substantially to the dissolved inorganic carbon excess of 10 Tg C observed during ISSS-08 for these waters. This evaluation suggests that extensive decay of terr-POC occurs already in the water column and contributes to outgassing of CO2. This process should be considered as a geographically dislocated carbon-climate coupling where thawing of vulnerable permafrost carbon on land is eventually adding CO2 above the ocean. Copyright 2011 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Sánchez-García, Laura Alling, Vanja Pugach, Svetlana Vonk, Jorien Van Dongen, Bart Humborg, Christoph Dudarev, Oleg Semiletov, Igor Gustafsson, Örjan |
spellingShingle |
Sánchez-García, Laura Alling, Vanja Pugach, Svetlana Vonk, Jorien Van Dongen, Bart Humborg, Christoph Dudarev, Oleg Semiletov, Igor Gustafsson, Örjan Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas |
author_facet |
Sánchez-García, Laura Alling, Vanja Pugach, Svetlana Vonk, Jorien Van Dongen, Bart Humborg, Christoph Dudarev, Oleg Semiletov, Igor Gustafsson, Örjan |
author_sort |
Sánchez-García, Laura |
title |
Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas |
title_short |
Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas |
title_full |
Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas |
title_fullStr |
Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas |
title_full_unstemmed |
Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas |
title_sort |
inventories and behavior of particulate organic carbon in the laptev and east siberian seas |
publishDate |
2011 |
url |
https://research.manchester.ac.uk/en/publications/abfc4bd2-d642-4fc2-841d-c9b1764c012e https://doi.org/10.1029/2010GB003862 |
geographic |
Arctic Arctic Ocean Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Laptev Sea |
genre |
Arctic Arctic Ocean laptev Laptev Sea permafrost |
genre_facet |
Arctic Arctic Ocean laptev Laptev Sea permafrost |
op_source |
Sánchez-García , L , Alling , V , Pugach , S , Vonk , J , Van Dongen , B , Humborg , C , Dudarev , O , Semiletov , I & Gustafsson , Ö 2011 , ' Inventories and behavior of particulate organic carbon in the Laptev and East Siberian seas ' , Global Biogeochemical Cycles , vol. 25 , no. 2 , GB2007 . https://doi.org/10.1029/2010GB003862 |
op_relation |
https://research.manchester.ac.uk/en/publications/abfc4bd2-d642-4fc2-841d-c9b1764c012e |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1029/2010GB003862 |
container_title |
Global Biogeochemical Cycles |
container_volume |
25 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1802640700824616960 |