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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ftdoajarticles:oai:doaj.org/article:0fcbe326e23246448dcecb384a5b626d 2023-05-15T14:34:52+02:00 Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years F. Lapointe P. Francus S. F. Lamoureux M. Vuille J.-P. Jenny R. S. Bradley C. Massa 2017-04-01T00:00:00Z https://doi.org/10.5194/cp-13-411-2017 https://doaj.org/article/0fcbe326e23246448dcecb384a5b626d EN eng Copernicus Publications http://www.clim-past.net/13/411/2017/cp-13-411-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-411-2017 https://doaj.org/article/0fcbe326e23246448dcecb384a5b626d Climate of the Past, Vol 13, Iss 4, Pp 411-420 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-411-2017 2022-12-31T16:06:47Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Bering Strait Pacific Climate of the Past 13 4 411 420 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 F. Lapointe P. Francus S. F. Lamoureux M. Vuille J.-P. Jenny R. S. Bradley C. Massa Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 |
F. Lapointe P. Francus S. F. Lamoureux M. Vuille J.-P. Jenny R. S. Bradley C. Massa |
author_facet |
F. Lapointe P. Francus S. F. Lamoureux M. Vuille J.-P. Jenny R. S. Bradley C. Massa |
author_sort |
F. Lapointe |
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://doaj.org/article/0fcbe326e23246448dcecb384a5b626d |
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_source |
Climate of the Past, Vol 13, Iss 4, Pp 411-420 (2017) |
op_relation |
http://www.clim-past.net/13/411/2017/cp-13-411-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-411-2017 https://doaj.org/article/0fcbe326e23246448dcecb384a5b626d |
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 |
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1766307817873997824 |