Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current
Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 123 (2018): 7453-7471, doi:10.1029/2018JC013825. A hig...
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Language: | English |
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John Wiley & Sons
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Online Access: | https://hdl.handle.net/1912/10793 |
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10793 2023-05-15T15:15:21+02:00 Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current Spall, Michael A. Pickart, Robert S. Li, Min Itoh, Motoyo Lin, Peigen Kikuchi, Takashi Qi, Yiquan 2018-10-22 https://hdl.handle.net/1912/10793 en_US eng John Wiley & Sons https://doi.org/10.1029/2018JC013825 Journal of Geophysical Research: Oceans 123 (2018): 7453-7471 https://hdl.handle.net/1912/10793 doi:10.1029/2018JC013825 Journal of Geophysical Research: Oceans 123 (2018): 7453-7471 doi:10.1029/2018JC013825 Canada Basin Halocline Ventilation Chukchi Sea Article 2018 ftwhoas https://doi.org/10.1029/2018JC013825 2022-05-28T23:00:32Z Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 123 (2018): 7453-7471, doi:10.1029/2018JC013825. A high‐resolution regional ocean model together with moored hydrographic and velocity measurements is used to identify the pathways and mechanisms by which Pacific water, modified over the Chukchi shelf, crosses the shelf break into the Canada Basin. Most of the Pacific water flowing into the Arctic Ocean through Bering Strait enters the Canada Basin through Barrow Canyon. Strong advection allows the water to cross the shelf break and exit the shelf. Wind forcing plays little role in this process. Some of the outflowing water from Barrow Canyon flows to the east into the Beaufort Sea; however, approximately 0.4 to 0.5 Sv turns to the west forming the newly identified Chukchi Slope Current. This transport occurs at all times of year, channeling both summer and winter waters from the shelf to the Canada Basin. The model indicates that approximately 75% of this water was exposed to the mixed layer within the Chukchi Sea, while the remaining 25% was able to cross the shelf during the stratified summer before convection commences in late fall. We view the Ό(0.5) Sv of the Chukchi Slope Current as replacing Beaufort Gyre water that would have come from the east in the absence of the cross-topography flow in Barrow Canyon. The weak eastward flow on the Beaufort slope is also consistent with the local disruption of the Beaufort Gyre by the Barrow Canyon outflow. Bureau of Ocean and Energy Management Grant Number: M12AC00008; DOC | National Oceanic and Atmospheric Administration (NOAA) Grant Number: NA16OAR4310248; National Science Foundation (NSF) Grant Numbers: PLR-1415489, OCE-1533170 2019-04-22 Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Bering Strait canada basin Chukchi Chukchi Sea Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Arctic Ocean Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Beaufort Slope ENVELOPE(-145.000,-145.000,71.000,71.000) Bering Strait Canada Chukchi Sea Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Pacific Journal of Geophysical Research: Oceans 123 10 7453 7471 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Canada Basin Halocline Ventilation Chukchi Sea |
spellingShingle |
Canada Basin Halocline Ventilation Chukchi Sea Spall, Michael A. Pickart, Robert S. Li, Min Itoh, Motoyo Lin, Peigen Kikuchi, Takashi Qi, Yiquan Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current |
topic_facet |
Canada Basin Halocline Ventilation Chukchi Sea |
description |
Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 123 (2018): 7453-7471, doi:10.1029/2018JC013825. A high‐resolution regional ocean model together with moored hydrographic and velocity measurements is used to identify the pathways and mechanisms by which Pacific water, modified over the Chukchi shelf, crosses the shelf break into the Canada Basin. Most of the Pacific water flowing into the Arctic Ocean through Bering Strait enters the Canada Basin through Barrow Canyon. Strong advection allows the water to cross the shelf break and exit the shelf. Wind forcing plays little role in this process. Some of the outflowing water from Barrow Canyon flows to the east into the Beaufort Sea; however, approximately 0.4 to 0.5 Sv turns to the west forming the newly identified Chukchi Slope Current. This transport occurs at all times of year, channeling both summer and winter waters from the shelf to the Canada Basin. The model indicates that approximately 75% of this water was exposed to the mixed layer within the Chukchi Sea, while the remaining 25% was able to cross the shelf during the stratified summer before convection commences in late fall. We view the Ό(0.5) Sv of the Chukchi Slope Current as replacing Beaufort Gyre water that would have come from the east in the absence of the cross-topography flow in Barrow Canyon. The weak eastward flow on the Beaufort slope is also consistent with the local disruption of the Beaufort Gyre by the Barrow Canyon outflow. Bureau of Ocean and Energy Management Grant Number: M12AC00008; DOC | National Oceanic and Atmospheric Administration (NOAA) Grant Number: NA16OAR4310248; National Science Foundation (NSF) Grant Numbers: PLR-1415489, OCE-1533170 2019-04-22 |
format |
Article in Journal/Newspaper |
author |
Spall, Michael A. Pickart, Robert S. Li, Min Itoh, Motoyo Lin, Peigen Kikuchi, Takashi Qi, Yiquan |
author_facet |
Spall, Michael A. Pickart, Robert S. Li, Min Itoh, Motoyo Lin, Peigen Kikuchi, Takashi Qi, Yiquan |
author_sort |
Spall, Michael A. |
title |
Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current |
title_short |
Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current |
title_full |
Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current |
title_fullStr |
Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current |
title_full_unstemmed |
Transport of Pacific water into the Canada Basin and the formation of the Chukchi Slope Current |
title_sort |
transport of pacific water into the canada basin and the formation of the chukchi slope current |
publisher |
John Wiley & Sons |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/10793 |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) ENVELOPE(-145.000,-145.000,71.000,71.000) ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Arctic Ocean Barrow Canyon Beaufort Slope Bering Strait Canada Chukchi Sea Chukchi Shelf Pacific |
geographic_facet |
Arctic Arctic Ocean Barrow Canyon Beaufort Slope Bering Strait Canada Chukchi Sea Chukchi Shelf Pacific |
genre |
Arctic Arctic Ocean Beaufort Sea Bering Strait canada basin Chukchi Chukchi Sea |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Bering Strait canada basin Chukchi Chukchi Sea |
op_source |
Journal of Geophysical Research: Oceans 123 (2018): 7453-7471 doi:10.1029/2018JC013825 |
op_relation |
https://doi.org/10.1029/2018JC013825 Journal of Geophysical Research: Oceans 123 (2018): 7453-7471 https://hdl.handle.net/1912/10793 doi:10.1029/2018JC013825 |
op_doi |
https://doi.org/10.1029/2018JC013825 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
10 |
container_start_page |
7453 |
op_container_end_page |
7471 |
_version_ |
1766345722109624320 |