Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years
Understanding how internal climate variability influences arctic regions is required to better forecast future global climate variations. This paper investigates an annually-laminated (varved) record from the western Canadian Arctic and finds that the varves are negatively correlated with both the i...
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00010319 2023-05-15T14:34:18+02:00 Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years Lapointe, François Francus, Pierre Lamoureux, Scott F. Vuille, Mathias Jenny, Jean-Philippe Bradley, Raymond S. Massa, Charly 2017-04 electronic https://doi.org/10.5194/cp-13-411-2017 https://noa.gwlb.de/receive/cop_mods_00010319 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010276/cp-13-411-2017.pdf https://cp.copernicus.org/articles/13/411/2017/cp-13-411-2017.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-13-411-2017 https://noa.gwlb.de/receive/cop_mods_00010319 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010276/cp-13-411-2017.pdf https://cp.copernicus.org/articles/13/411/2017/cp-13-411-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/cp-13-411-2017 2022-02-08T22:57:06Z Understanding how internal climate variability influences arctic regions is required to better forecast future global climate variations. This paper investigates an annually-laminated (varved) record from the western Canadian Arctic and finds that the varves are negatively correlated with both the instrumental Pacific Decadal Oscillation (PDO) during the past century and also with reconstructed PDO over the past 700 years, suggesting drier Arctic conditions during high-PDO phases, and vice versa. These results are in agreement with known regional teleconnections, whereby the PDO is negatively and positively correlated with summer precipitation and mean sea level pressure respectively. This pattern is also evident during the positive phase of the North Pacific Index (NPI) in autumn. Reduced sea-ice cover during summer–autumn is observed in the region during PDO− (NPI+) and is associated with low-level southerly winds that originate from the northernmost Pacific across the Bering Strait and can reach as far as the western Canadian Arctic. These climate anomalies are associated with the PDO− (NPI+) phase and are key factors in enhancing evaporation and subsequent precipitation in this region of the Arctic. Collectively, the sedimentary evidence suggests that North Pacific climate variability has been a persistent regulator of the regional climate in the western Canadian Arctic. Since projected sea-ice loss will contribute to enhanced future warming in the Arctic, future negative phases of the PDO (or NPI+) will likely act to amplify this positive feedback. Article in Journal/Newspaper Arctic Bering Strait Sea ice Niedersächsisches Online-Archiv NOA Arctic Bering Strait Pacific Climate of the Past 13 4 411 420 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Lapointe, François Francus, Pierre Lamoureux, Scott F. Vuille, Mathias Jenny, Jean-Philippe Bradley, Raymond S. Massa, Charly Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years |
topic_facet |
article Verlagsveröffentlichung |
description |
Understanding how internal climate variability influences arctic regions is required to better forecast future global climate variations. This paper investigates an annually-laminated (varved) record from the western Canadian Arctic and finds that the varves are negatively correlated with both the instrumental Pacific Decadal Oscillation (PDO) during the past century and also with reconstructed PDO over the past 700 years, suggesting drier Arctic conditions during high-PDO phases, and vice versa. These results are in agreement with known regional teleconnections, whereby the PDO is negatively and positively correlated with summer precipitation and mean sea level pressure respectively. This pattern is also evident during the positive phase of the North Pacific Index (NPI) in autumn. Reduced sea-ice cover during summer–autumn is observed in the region during PDO− (NPI+) and is associated with low-level southerly winds that originate from the northernmost Pacific across the Bering Strait and can reach as far as the western Canadian Arctic. These climate anomalies are associated with the PDO− (NPI+) phase and are key factors in enhancing evaporation and subsequent precipitation in this region of the Arctic. Collectively, the sedimentary evidence suggests that North Pacific climate variability has been a persistent regulator of the regional climate in the western Canadian Arctic. Since projected sea-ice loss will contribute to enhanced future warming in the Arctic, future negative phases of the PDO (or NPI+) will likely act to amplify this positive feedback. |
format |
Article in Journal/Newspaper |
author |
Lapointe, François Francus, Pierre Lamoureux, Scott F. Vuille, Mathias Jenny, Jean-Philippe Bradley, Raymond S. Massa, Charly |
author_facet |
Lapointe, François Francus, Pierre Lamoureux, Scott F. Vuille, Mathias Jenny, Jean-Philippe Bradley, Raymond S. Massa, Charly |
author_sort |
Lapointe, François |
title |
Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years |
title_short |
Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years |
title_full |
Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years |
title_fullStr |
Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years |
title_full_unstemmed |
Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years |
title_sort |
influence of north pacific decadal variability on the western canadian arctic over the past 700 years |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-411-2017 https://noa.gwlb.de/receive/cop_mods_00010319 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010276/cp-13-411-2017.pdf https://cp.copernicus.org/articles/13/411/2017/cp-13-411-2017.pdf |
geographic |
Arctic Bering Strait Pacific |
geographic_facet |
Arctic Bering Strait Pacific |
genre |
Arctic Bering Strait Sea ice |
genre_facet |
Arctic Bering Strait Sea ice |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-13-411-2017 https://noa.gwlb.de/receive/cop_mods_00010319 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010276/cp-13-411-2017.pdf https://cp.copernicus.org/articles/13/411/2017/cp-13-411-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-13-411-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
4 |
container_start_page |
411 |
op_container_end_page |
420 |
_version_ |
1766307373464420352 |