Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U
Anthropogenic radionuclides 129I and 236U are used to investigate pathways of the Atlantic Water flow in the Canada Basin, estimate transport timescales, and investigate mixing dynamics within the Atlantic Water layer and the overlying Pacific Water. Transit Time Distribution (TTD) model mean ages i...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/680368 2024-09-30T14:30:05+00:00 Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U Payne, Annabel id_orcid:0 000-0001-9523-0316 Wefing, Anne-Marie id_orcid:0 000-0001-6855-6062 Christl, Marcus id_orcid:0 000-0002-3131-6652 Vockenhuber, Christof Williams, William Smith, John N. Casacuberta, Núria id_orcid:0 000-0001-7316-1655 2024-06 application/application/pdf https://hdl.handle.net/20.500.11850/680368 https://doi.org/10.3929/ethz-b-000680368 en eng Wiley info:eu-repo/semantics/altIdentifier/doi/10.1029/2023JC020813 info:eu-repo/semantics/altIdentifier/wos/001251176500001 info:eu-repo/grantAgreement/EC/H2020/101001451 http://hdl.handle.net/20.500.11850/680368 doi:10.3929/ethz-b-000680368 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International Journal of Geophysical Research: Oceans, 129 (6) Arctic Ocean Canada basin Ocean tracers Atlantic Water transit time distribution Pacific Winter Water info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2024 ftethz https://doi.org/20.500.11850/68036810.3929/ethz-b-00068036810.1029/2023JC020813 2024-09-10T15:45:30Z Anthropogenic radionuclides 129I and 236U are used to investigate pathways of the Atlantic Water flow in the Canada Basin, estimate transport timescales, and investigate mixing dynamics within the Atlantic Water layer and the overlying Pacific Water. Transit Time Distribution (TTD) model mean ages indicate water takes 25–35 years to reach the Canada Basin from the entrance of the Arctic, with limited lateral and vertical mixing along the core of the Arctic Ocean Boundary Current. Mode ages obtained from the model yield shorter transport times of 20–32 years. These age estimates agree with previous studies using these radionuclides and ventilation tracers in this region, indicating a steady-state flow of Atlantic Water for the last 15 years. The distribution of the isotopes in the Atlantic layer indicates two pathways Atlantic Water may take into the basin, supported by the distribution of ages in the TTD model. End-member mixing models indicate that the Pacific Winter water acquires a 20%–40% Atlantic Water signal of the radionuclides, upwelled over short periods, most likely along the shelf and Barrow Canyon region. ISSN:0148-0227 ISSN:2169-9275 Article in Journal/Newspaper Arctic Arctic Ocean canada basin ETH Zürich Research Collection Arctic Arctic Ocean Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Canada Pacific |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
Arctic Ocean Canada basin Ocean tracers Atlantic Water transit time distribution Pacific Winter Water |
spellingShingle |
Arctic Ocean Canada basin Ocean tracers Atlantic Water transit time distribution Pacific Winter Water Payne, Annabel id_orcid:0 000-0001-9523-0316 Wefing, Anne-Marie id_orcid:0 000-0001-6855-6062 Christl, Marcus id_orcid:0 000-0002-3131-6652 Vockenhuber, Christof Williams, William Smith, John N. Casacuberta, Núria id_orcid:0 000-0001-7316-1655 Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U |
topic_facet |
Arctic Ocean Canada basin Ocean tracers Atlantic Water transit time distribution Pacific Winter Water |
description |
Anthropogenic radionuclides 129I and 236U are used to investigate pathways of the Atlantic Water flow in the Canada Basin, estimate transport timescales, and investigate mixing dynamics within the Atlantic Water layer and the overlying Pacific Water. Transit Time Distribution (TTD) model mean ages indicate water takes 25–35 years to reach the Canada Basin from the entrance of the Arctic, with limited lateral and vertical mixing along the core of the Arctic Ocean Boundary Current. Mode ages obtained from the model yield shorter transport times of 20–32 years. These age estimates agree with previous studies using these radionuclides and ventilation tracers in this region, indicating a steady-state flow of Atlantic Water for the last 15 years. The distribution of the isotopes in the Atlantic layer indicates two pathways Atlantic Water may take into the basin, supported by the distribution of ages in the TTD model. End-member mixing models indicate that the Pacific Winter water acquires a 20%–40% Atlantic Water signal of the radionuclides, upwelled over short periods, most likely along the shelf and Barrow Canyon region. ISSN:0148-0227 ISSN:2169-9275 |
format |
Article in Journal/Newspaper |
author |
Payne, Annabel id_orcid:0 000-0001-9523-0316 Wefing, Anne-Marie id_orcid:0 000-0001-6855-6062 Christl, Marcus id_orcid:0 000-0002-3131-6652 Vockenhuber, Christof Williams, William Smith, John N. Casacuberta, Núria id_orcid:0 000-0001-7316-1655 |
author_facet |
Payne, Annabel id_orcid:0 000-0001-9523-0316 Wefing, Anne-Marie id_orcid:0 000-0001-6855-6062 Christl, Marcus id_orcid:0 000-0002-3131-6652 Vockenhuber, Christof Williams, William Smith, John N. Casacuberta, Núria id_orcid:0 000-0001-7316-1655 |
author_sort |
Payne, Annabel |
title |
Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U |
title_short |
Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U |
title_full |
Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U |
title_fullStr |
Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U |
title_full_unstemmed |
Circulation Timescales and Pathways of Atlantic Water in the Canada Basin: Insights From Transient Tracers ¹²⁹I and ²³⁶U |
title_sort |
circulation timescales and pathways of atlantic water in the canada basin: insights from transient tracers ¹²⁹i and ²³⁶u |
publisher |
Wiley |
publishDate |
2024 |
url |
https://hdl.handle.net/20.500.11850/680368 https://doi.org/10.3929/ethz-b-000680368 |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) |
geographic |
Arctic Arctic Ocean Barrow Canyon Canada Pacific |
geographic_facet |
Arctic Arctic Ocean Barrow Canyon Canada Pacific |
genre |
Arctic Arctic Ocean canada basin |
genre_facet |
Arctic Arctic Ocean canada basin |
op_source |
Journal of Geophysical Research: Oceans, 129 (6) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2023JC020813 info:eu-repo/semantics/altIdentifier/wos/001251176500001 info:eu-repo/grantAgreement/EC/H2020/101001451 http://hdl.handle.net/20.500.11850/680368 doi:10.3929/ethz-b-000680368 |
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/20.500.11850/68036810.3929/ethz-b-00068036810.1029/2023JC020813 |
_version_ |
1811635158082650112 |