Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations.
The role of wind forcing on the vertical displacement of the −1°C isotherm and 33.8 isohaline depths was examined based on snapshots of historical (1950–2013) temperature and salinity profiles along the Mackenzie continental slope (Beaufort Sea). It is found that upwelling is correlated with along-s...
Published in: | Journal of Climate |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://espace.inrs.ca/id/eprint/6487/ https://espace.inrs.ca/id/eprint/6487/1/P3174.pdf https://doi.org/10.1175/JCLI-D-15-0804.1 |
id |
ftinrsquebec:oai:espace.inrs.ca:6487 |
---|---|
record_format |
openpolar |
spelling |
ftinrsquebec:oai:espace.inrs.ca:6487 2023-05-15T13:15:08+02:00 Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. Kirillov, Sergei Dmitrenko, Igor Tremblay, Bruno Gratton, Yves Barber, David G. Rysgaard, Søren 2016 application/pdf https://espace.inrs.ca/id/eprint/6487/ https://espace.inrs.ca/id/eprint/6487/1/P3174.pdf https://doi.org/10.1175/JCLI-D-15-0804.1 en eng https://espace.inrs.ca/id/eprint/6487/1/P3174.pdf Kirillov, Sergei, Dmitrenko, Igor, Tremblay, Bruno, Gratton, Yves, Barber, David G. et Rysgaard, Søren (2016). Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. Journal of Climate , vol. 29 , nº 12. p. 4509-4523. DOI:10.1175/JCLI-D-15-0804.1 <https://doi.org/10.1175/JCLI-D-15-0804.1>. doi:10.1175/JCLI-D-15-0804.1 circulation/ dynamics Arctic oscillation atmosphere-ocean interaction Ekman pumping/transport upwelling/downwelling observational techniques and algorithms ship observations Article Évalué par les pairs 2016 ftinrsquebec https://doi.org/10.1175/JCLI-D-15-0804.1 2023-02-10T11:44:03Z The role of wind forcing on the vertical displacement of the −1°C isotherm and 33.8 isohaline depths was examined based on snapshots of historical (1950–2013) temperature and salinity profiles along the Mackenzie continental slope (Beaufort Sea). It is found that upwelling is correlated with along-slope northeast (T59°) winds during both ice-free and ice-covered conditions, although the wind impact is more efficient during the ice-free season. One of the most important factors responsible for vertical displacements of isopycnals is sustained wind forcing that can last for several weeks and even longer. It accounts for 14%–55% of total variance in isotherm/isohaline depths, although these numbers might be underestimated. The upwelling and downwelling events are discussed in the context of the interplay between two regional centers of action—the Beaufort high and Aleutian low—that control the wind pattern over the southern Beaufort Sea. The probability of upwelling-favorable wind occurrence is closely related to the sea level pressure difference between these two centers, as well as their geographical positions. The combined effect of both centers expressed as the SLP differences is highly correlated (0.68/0.66 for summer/winter) with occurrences of extreme upwelling-favorable northeast (NE) winds over the Mackenzie slope, although the Beaufort high plays a more important role. The authors also diagnosed the predominant upwelling-favorable conditions over the Mackenzie slope in the recent decade associated with the summertime amplification of the Beaufort high. The upwelling-favorable NE wind occurrences also demonstrate the significant but low (−0.30) correlation with Arctic Oscillation (AO) during both summer and winter seasons, whereas the high correlation with North Pacific index (NPI; −0.52) is obtained only for the ice-covered period. Article in Journal/Newspaper aleutian low Arctic Beaufort Sea Institut national de la recherche scientifique, Québec: Espace INRS Arctic Pacific Journal of Climate 29 12 4509 4523 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
circulation/ dynamics Arctic oscillation atmosphere-ocean interaction Ekman pumping/transport upwelling/downwelling observational techniques and algorithms ship observations |
spellingShingle |
circulation/ dynamics Arctic oscillation atmosphere-ocean interaction Ekman pumping/transport upwelling/downwelling observational techniques and algorithms ship observations Kirillov, Sergei Dmitrenko, Igor Tremblay, Bruno Gratton, Yves Barber, David G. Rysgaard, Søren Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. |
topic_facet |
circulation/ dynamics Arctic oscillation atmosphere-ocean interaction Ekman pumping/transport upwelling/downwelling observational techniques and algorithms ship observations |
description |
The role of wind forcing on the vertical displacement of the −1°C isotherm and 33.8 isohaline depths was examined based on snapshots of historical (1950–2013) temperature and salinity profiles along the Mackenzie continental slope (Beaufort Sea). It is found that upwelling is correlated with along-slope northeast (T59°) winds during both ice-free and ice-covered conditions, although the wind impact is more efficient during the ice-free season. One of the most important factors responsible for vertical displacements of isopycnals is sustained wind forcing that can last for several weeks and even longer. It accounts for 14%–55% of total variance in isotherm/isohaline depths, although these numbers might be underestimated. The upwelling and downwelling events are discussed in the context of the interplay between two regional centers of action—the Beaufort high and Aleutian low—that control the wind pattern over the southern Beaufort Sea. The probability of upwelling-favorable wind occurrence is closely related to the sea level pressure difference between these two centers, as well as their geographical positions. The combined effect of both centers expressed as the SLP differences is highly correlated (0.68/0.66 for summer/winter) with occurrences of extreme upwelling-favorable northeast (NE) winds over the Mackenzie slope, although the Beaufort high plays a more important role. The authors also diagnosed the predominant upwelling-favorable conditions over the Mackenzie slope in the recent decade associated with the summertime amplification of the Beaufort high. The upwelling-favorable NE wind occurrences also demonstrate the significant but low (−0.30) correlation with Arctic Oscillation (AO) during both summer and winter seasons, whereas the high correlation with North Pacific index (NPI; −0.52) is obtained only for the ice-covered period. |
format |
Article in Journal/Newspaper |
author |
Kirillov, Sergei Dmitrenko, Igor Tremblay, Bruno Gratton, Yves Barber, David G. Rysgaard, Søren |
author_facet |
Kirillov, Sergei Dmitrenko, Igor Tremblay, Bruno Gratton, Yves Barber, David G. Rysgaard, Søren |
author_sort |
Kirillov, Sergei |
title |
Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. |
title_short |
Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. |
title_full |
Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. |
title_fullStr |
Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. |
title_full_unstemmed |
Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. |
title_sort |
upwelling of atlantic water along the canadian beaufort sea continental slope: favorable atmospheric conditions and seasonal and interannual variations. |
publishDate |
2016 |
url |
https://espace.inrs.ca/id/eprint/6487/ https://espace.inrs.ca/id/eprint/6487/1/P3174.pdf https://doi.org/10.1175/JCLI-D-15-0804.1 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
aleutian low Arctic Beaufort Sea |
genre_facet |
aleutian low Arctic Beaufort Sea |
op_relation |
https://espace.inrs.ca/id/eprint/6487/1/P3174.pdf Kirillov, Sergei, Dmitrenko, Igor, Tremblay, Bruno, Gratton, Yves, Barber, David G. et Rysgaard, Søren (2016). Upwelling of Atlantic Water along the Canadian Beaufort Sea Continental Slope: Favorable Atmospheric Conditions and Seasonal and Interannual Variations. Journal of Climate , vol. 29 , nº 12. p. 4509-4523. DOI:10.1175/JCLI-D-15-0804.1 <https://doi.org/10.1175/JCLI-D-15-0804.1>. doi:10.1175/JCLI-D-15-0804.1 |
op_doi |
https://doi.org/10.1175/JCLI-D-15-0804.1 |
container_title |
Journal of Climate |
container_volume |
29 |
container_issue |
12 |
container_start_page |
4509 |
op_container_end_page |
4523 |
_version_ |
1766267083172085760 |