Ice content, DOC storage and annual permafrost eroding in 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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.868914 2024-09-15T17:51:02+00:00 Ice content, DOC storage and annual permafrost eroding in the Arctic Ocean Tanski, George Couture, Nicole Lantuit, Hugues Eulenburg, Antje Fritz, Michael MEDIAN LATITUDE: 69.342629 * MEDIAN LONGITUDE: -138.749020 * SOUTH-BOUND LATITUDE: 68.880290 * WEST-BOUND LONGITUDE: -140.947110 * NORTH-BOUND LATITUDE: 69.618900 * EAST-BOUND LONGITUDE: -136.494900 * DATE/TIME START: 2013-06-23T00:00:00 * DATE/TIME END: 2013-08-03T00:00:00 2016 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.868914 https://doi.org/10.1594/PANGAEA.868914 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.868914 https://doi.org/10.1594/PANGAEA.868914 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Tanski, George; Couture, Nicole; Lantuit, Hugues; Eulenburg, Antje; Fritz, Michael (2016): Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean. Global Biogeochemical Cycles, 30(7), 1054-1068, https://doi.org/10.1002/2015GB005337 AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI dataset publication series 2016 ftpangaea https://doi.org/10.1594/PANGAEA.86891410.1002/2015GB005337 2024-07-24T02:31:21Z 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 347.0 mg/l with an estimated stock of 13.6 ± 3.0 g/m**3 along the YC. An annual DOC flux of 54.9 ± 0.9 Mg/yr 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. Other/Unknown Material Arctic Arctic Ocean Ice permafrost Yukon PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-140.947110,-136.494900,69.618900,68.880290) |
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Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI |
spellingShingle |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI Tanski, George Couture, Nicole Lantuit, Hugues Eulenburg, Antje Fritz, Michael Ice content, DOC storage and annual permafrost eroding in the Arctic Ocean |
topic_facet |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI |
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 347.0 mg/l with an estimated stock of 13.6 ± 3.0 g/m**3 along the YC. An annual DOC flux of 54.9 ± 0.9 Mg/yr 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 |
Other/Unknown Material |
author |
Tanski, George Couture, Nicole Lantuit, Hugues Eulenburg, Antje Fritz, Michael |
author_facet |
Tanski, George Couture, Nicole Lantuit, Hugues Eulenburg, Antje Fritz, Michael |
author_sort |
Tanski, George |
title |
Ice content, DOC storage and annual permafrost eroding in the Arctic Ocean |
title_short |
Ice content, DOC storage and annual permafrost eroding in the Arctic Ocean |
title_full |
Ice content, DOC storage and annual permafrost eroding in the Arctic Ocean |
title_fullStr |
Ice content, DOC storage and annual permafrost eroding in the Arctic Ocean |
title_full_unstemmed |
Ice content, DOC storage and annual permafrost eroding in the Arctic Ocean |
title_sort |
ice content, doc storage and annual permafrost eroding in the arctic ocean |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.868914 https://doi.org/10.1594/PANGAEA.868914 |
op_coverage |
MEDIAN LATITUDE: 69.342629 * MEDIAN LONGITUDE: -138.749020 * SOUTH-BOUND LATITUDE: 68.880290 * WEST-BOUND LONGITUDE: -140.947110 * NORTH-BOUND LATITUDE: 69.618900 * EAST-BOUND LONGITUDE: -136.494900 * DATE/TIME START: 2013-06-23T00:00:00 * DATE/TIME END: 2013-08-03T00:00:00 |
long_lat |
ENVELOPE(-140.947110,-136.494900,69.618900,68.880290) |
genre |
Arctic Arctic Ocean Ice permafrost Yukon |
genre_facet |
Arctic Arctic Ocean Ice permafrost Yukon |
op_source |
Supplement to: Tanski, George; Couture, Nicole; Lantuit, Hugues; Eulenburg, Antje; Fritz, Michael (2016): Eroding permafrost coasts release low amounts of dissolved organic carbon (DOC) from ground ice into the nearshore zone of the Arctic Ocean. Global Biogeochemical Cycles, 30(7), 1054-1068, https://doi.org/10.1002/2015GB005337 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.868914 https://doi.org/10.1594/PANGAEA.868914 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.86891410.1002/2015GB005337 |
_version_ |
1810292851883376640 |