Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean
Ice-rich permafrost coasts in the Arctic are highly sensitive to climate warming and erode at a pace that exceeds the global average. Permafrost coasts deliver vast amounts of organic carbon into the nearshore zone of the Arctic Ocean. Numbers on flux exist for particulate organic carbon (POC) and t...
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:45156 2023-12-03T10:15:55+01:00 Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean Tanski, George Couture, Nicole Lantuit, Hugues (Prof. Dr.) Eulenburg, Antje Fritz, Michael (Dr.) 2016 https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45156 https://doi.org/10.1002/2015GB005337 eng eng https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45156 https://doi.org/10.1002/2015GB005337 info:eu-repo/semantics/closedAccess Institut für Biochemie und Biologie article doc-type:article 2016 ftubpotsdam https://doi.org/10.1002/2015GB005337 2023-11-05T23:35:04Z Ice-rich permafrost coasts in the Arctic are highly sensitive to climate warming and erode at a pace that exceeds the global average. Permafrost coasts deliver vast amounts of organic carbon into the nearshore zone of the Arctic Ocean. Numbers on flux exist for particulate organic carbon (POC) and total or soil organic carbon (TOC, SOC). However, they do not exist for dissolved organic carbon (DOC), which is known to be highly bioavailable. This study aims to estimate DOC stocks in coastal permafrost as well as the annual flux into the ocean. DOC concentrations in ground ice were analyzed along the ice-rich Yukon coast (YC) in the western Canadian Arctic. The annual DOC flux was estimated using available numbers for coast length, cliff height, annual erosion rate, and volumetric ice content in different stratigraphic horizons. Our results showed that DOC concentrations in ground ice range between 0.3 and 347.0mgL(-1) with an estimated stock of 13.63.0gm(-3) along the YC. An annual DOC flux of 54.90.9Mgyr(-1) was computed. These DOC fluxes are low compared to POC and SOC fluxes from coastal erosion or POC and DOC fluxes from Arctic rivers. We conclude that DOC fluxes from permafrost coasts play a secondary role in the Arctic carbon budget. However, this DOC is assumed to be highly bioavailable. We hypothesize that DOC from coastal erosion is important for ecosystems in the Arctic nearshore zones, particularly in summer when river discharge is low, and in areas where rivers are absent. Article in Journal/Newspaper Arctic Arctic Ocean Ice permafrost Yukon University of Potsdam: publish.UP Arctic Arctic Ocean Yukon Global Biogeochemical Cycles 30 7 1054 1068 |
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Open Polar |
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University of Potsdam: publish.UP |
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ftubpotsdam |
language |
English |
topic |
Institut für Biochemie und Biologie |
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Institut für Biochemie und Biologie Tanski, George Couture, Nicole Lantuit, Hugues (Prof. Dr.) Eulenburg, Antje Fritz, Michael (Dr.) Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean |
topic_facet |
Institut für Biochemie und Biologie |
description |
Ice-rich permafrost coasts in the Arctic are highly sensitive to climate warming and erode at a pace that exceeds the global average. Permafrost coasts deliver vast amounts of organic carbon into the nearshore zone of the Arctic Ocean. Numbers on flux exist for particulate organic carbon (POC) and total or soil organic carbon (TOC, SOC). However, they do not exist for dissolved organic carbon (DOC), which is known to be highly bioavailable. This study aims to estimate DOC stocks in coastal permafrost as well as the annual flux into the ocean. DOC concentrations in ground ice were analyzed along the ice-rich Yukon coast (YC) in the western Canadian Arctic. The annual DOC flux was estimated using available numbers for coast length, cliff height, annual erosion rate, and volumetric ice content in different stratigraphic horizons. Our results showed that DOC concentrations in ground ice range between 0.3 and 347.0mgL(-1) with an estimated stock of 13.63.0gm(-3) along the YC. An annual DOC flux of 54.90.9Mgyr(-1) was computed. These DOC fluxes are low compared to POC and SOC fluxes from coastal erosion or POC and DOC fluxes from Arctic rivers. We conclude that DOC fluxes from permafrost coasts play a secondary role in the Arctic carbon budget. However, this DOC is assumed to be highly bioavailable. We hypothesize that DOC from coastal erosion is important for ecosystems in the Arctic nearshore zones, particularly in summer when river discharge is low, and in areas where rivers are absent. |
format |
Article in Journal/Newspaper |
author |
Tanski, George Couture, Nicole Lantuit, Hugues (Prof. Dr.) Eulenburg, Antje Fritz, Michael (Dr.) |
author_facet |
Tanski, George Couture, Nicole Lantuit, Hugues (Prof. Dr.) Eulenburg, Antje Fritz, Michael (Dr.) |
author_sort |
Tanski, George |
title |
Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean |
title_short |
Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean |
title_full |
Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean |
title_fullStr |
Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean |
title_full_unstemmed |
Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean |
title_sort |
eroding permafrost coasts release low amounts of dissolved organic carbon (doc) from ground ice into the nearshore zone of the arctic ocean |
publishDate |
2016 |
url |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45156 https://doi.org/10.1002/2015GB005337 |
geographic |
Arctic Arctic Ocean Yukon |
geographic_facet |
Arctic Arctic Ocean Yukon |
genre |
Arctic Arctic Ocean Ice permafrost Yukon |
genre_facet |
Arctic Arctic Ocean Ice permafrost Yukon |
op_relation |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45156 https://doi.org/10.1002/2015GB005337 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/2015GB005337 |
container_title |
Global Biogeochemical Cycles |
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30 |
container_issue |
7 |
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1054 |
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1068 |
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1784262795433345024 |