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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ftunivgent:oai:archive.ugent.be:8761135 2023-09-26T15:13:06+02:00 Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years Lapointe, Francois Francus, Pierre Lamoureux, Scott F. Vuille, Mathias Jenny, Jean-Philippe Bradley, Raymond S. Massa, Charly 2017 application/pdf https://biblio.ugent.be/publication/8761135 http://hdl.handle.net/1854/LU-8761135 https://doi.org/10.5194/cp-13-411-2017 https://biblio.ugent.be/publication/8761135/file/8761136 eng eng https://biblio.ugent.be/publication/8761135 http://hdl.handle.net/1854/LU-8761135 http://dx.doi.org/10.5194/cp-13-411-2017 https://biblio.ugent.be/publication/8761135/file/8761136 A specific license has been chosen by the rights holder. Get in touch with the rights holder for reuse rights. info:eu-repo/semantics/openAccess CLIMATE OF THE PAST ISSN: 1814-9324 ISSN: 1814-9332 Earth and Environmental Sciences SEA-ICE CLIMATE VARIABILITY INTERDECADAL VARIABILITY GEOPOTENTIAL HEIGHT ELLESMERE-ISLAND SEDIMENT YIELD CAPE BOUNTY OSCILLATION LAKE TEMPERATURE journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftunivgent https://doi.org/10.5194/cp-13-411-2017 2023-08-30T22:07:07Z 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 Ellesmere Island Sea ice Ghent University Academic Bibliography Arctic Bering Strait Ellesmere Island Pacific Cape Bounty ENVELOPE(-109.542,-109.542,74.863,74.863) Climate of the Past 13 4 411 420 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences SEA-ICE CLIMATE VARIABILITY INTERDECADAL VARIABILITY GEOPOTENTIAL HEIGHT ELLESMERE-ISLAND SEDIMENT YIELD CAPE BOUNTY OSCILLATION LAKE TEMPERATURE |
spellingShingle |
Earth and Environmental Sciences SEA-ICE CLIMATE VARIABILITY INTERDECADAL VARIABILITY GEOPOTENTIAL HEIGHT ELLESMERE-ISLAND SEDIMENT YIELD CAPE BOUNTY OSCILLATION LAKE TEMPERATURE Lapointe, Francois 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 |
Earth and Environmental Sciences SEA-ICE CLIMATE VARIABILITY INTERDECADAL VARIABILITY GEOPOTENTIAL HEIGHT ELLESMERE-ISLAND SEDIMENT YIELD CAPE BOUNTY OSCILLATION LAKE TEMPERATURE |
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, Francois Francus, Pierre Lamoureux, Scott F. Vuille, Mathias Jenny, Jean-Philippe Bradley, Raymond S. Massa, Charly |
author_facet |
Lapointe, Francois Francus, Pierre Lamoureux, Scott F. Vuille, Mathias Jenny, Jean-Philippe Bradley, Raymond S. Massa, Charly |
author_sort |
Lapointe, Francois |
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 |
publishDate |
2017 |
url |
https://biblio.ugent.be/publication/8761135 http://hdl.handle.net/1854/LU-8761135 https://doi.org/10.5194/cp-13-411-2017 https://biblio.ugent.be/publication/8761135/file/8761136 |
long_lat |
ENVELOPE(-109.542,-109.542,74.863,74.863) |
geographic |
Arctic Bering Strait Ellesmere Island Pacific Cape Bounty |
geographic_facet |
Arctic Bering Strait Ellesmere Island Pacific Cape Bounty |
genre |
Arctic Bering Strait Ellesmere Island Sea ice |
genre_facet |
Arctic Bering Strait Ellesmere Island Sea ice |
op_source |
CLIMATE OF THE PAST ISSN: 1814-9324 ISSN: 1814-9332 |
op_relation |
https://biblio.ugent.be/publication/8761135 http://hdl.handle.net/1854/LU-8761135 http://dx.doi.org/10.5194/cp-13-411-2017 https://biblio.ugent.be/publication/8761135/file/8761136 |
op_rights |
A specific license has been chosen by the rights holder. Get in touch with the rights holder for reuse rights. 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_ |
1778133582201487360 |