Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada
Rapid warming of the Arctic is accelerating thaw of permafrost, which mobilizes organic carbon (OC). Remineralization of this carbon can contribute to further climate warming. The Peel River watershed is underlain by continuous and discontinuous permafrost and covers a diverse set of landscapes from...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/593587 2024-02-11T10:01:19+01:00 Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada Haghipour, Negar Eglinton, Timothy Vonk, Jorien Keskitalo, Kirsi Speetjens, Niek Overduin, Paul Westermann, Sebastian Miesner, Frederieke Sachs, Torsten Nitze, Ingmar Bröder, Lisa 2022 application/application/pdf https://hdl.handle.net/20.500.11850/593587 https://doi.org/10.3929/ethz-b-000593587 en eng Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu22-9657 http://hdl.handle.net/20.500.11850/593587 doi:10.3929/ethz-b-000593587 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International EGUsphere info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/updatedVersion 2022 ftethz https://doi.org/20.500.11850/59358710.3929/ethz-b-00059358710.5194/egusphere-egu22-9657 2024-01-15T00:50:59Z Rapid warming of the Arctic is accelerating thaw of permafrost, which mobilizes organic carbon (OC). Remineralization of this carbon can contribute to further climate warming. The Peel River watershed is underlain by continuous and discontinuous permafrost and covers a diverse set of landscapes from wetlands to barren mountainous areas. Part of the watershed undergoes abrupt permafrost thaw that releases particulate OC (POC) to the fluvial system. In this study, we couple landscape characteristics to river POC to better understand its spatial variability and the changes imposed on the watershed by permafrost thaw. We sampled POC in July-August 2019 in the Peel River main stem and its tributaries (total n=~120) and used carbon isotopes and lipid biomarkers to characterize its composition and trace its sources. Our first results indicate a compositional diversity within the watershed as POC ranges between <0.1 and 2.1 mg L-1, δ13C-POC from -36.7 to -26.5‰ and Δ14C-POC from -906.4 to -43.5‰. Ongoing changes in the watershed can be traced within its waters, and may help us to decipher how it is changing and may change in the future. Conference Object Arctic permafrost ETH Zürich Research Collection Arctic Canada Peel River ENVELOPE(-135.005,-135.005,67.000,67.000) |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
description |
Rapid warming of the Arctic is accelerating thaw of permafrost, which mobilizes organic carbon (OC). Remineralization of this carbon can contribute to further climate warming. The Peel River watershed is underlain by continuous and discontinuous permafrost and covers a diverse set of landscapes from wetlands to barren mountainous areas. Part of the watershed undergoes abrupt permafrost thaw that releases particulate OC (POC) to the fluvial system. In this study, we couple landscape characteristics to river POC to better understand its spatial variability and the changes imposed on the watershed by permafrost thaw. We sampled POC in July-August 2019 in the Peel River main stem and its tributaries (total n=~120) and used carbon isotopes and lipid biomarkers to characterize its composition and trace its sources. Our first results indicate a compositional diversity within the watershed as POC ranges between <0.1 and 2.1 mg L-1, δ13C-POC from -36.7 to -26.5‰ and Δ14C-POC from -906.4 to -43.5‰. Ongoing changes in the watershed can be traced within its waters, and may help us to decipher how it is changing and may change in the future. |
format |
Conference Object |
author |
Haghipour, Negar Eglinton, Timothy Vonk, Jorien Keskitalo, Kirsi Speetjens, Niek Overduin, Paul Westermann, Sebastian Miesner, Frederieke Sachs, Torsten Nitze, Ingmar Bröder, Lisa |
spellingShingle |
Haghipour, Negar Eglinton, Timothy Vonk, Jorien Keskitalo, Kirsi Speetjens, Niek Overduin, Paul Westermann, Sebastian Miesner, Frederieke Sachs, Torsten Nitze, Ingmar Bröder, Lisa Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada |
author_facet |
Haghipour, Negar Eglinton, Timothy Vonk, Jorien Keskitalo, Kirsi Speetjens, Niek Overduin, Paul Westermann, Sebastian Miesner, Frederieke Sachs, Torsten Nitze, Ingmar Bröder, Lisa |
author_sort |
Haghipour, Negar |
title |
Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada |
title_short |
Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada |
title_full |
Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada |
title_fullStr |
Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada |
title_full_unstemmed |
Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada |
title_sort |
particulate organic carbon composition and landscape characteristics in the peel river watershed, canada |
publisher |
Copernicus |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.11850/593587 https://doi.org/10.3929/ethz-b-000593587 |
long_lat |
ENVELOPE(-135.005,-135.005,67.000,67.000) |
geographic |
Arctic Canada Peel River |
geographic_facet |
Arctic Canada Peel River |
genre |
Arctic permafrost |
genre_facet |
Arctic permafrost |
op_source |
EGUsphere |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu22-9657 http://hdl.handle.net/20.500.11850/593587 doi:10.3929/ethz-b-000593587 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_doi |
https://doi.org/20.500.11850/59358710.3929/ethz-b-00059358710.5194/egusphere-egu22-9657 |
_version_ |
1790597129722396672 |