The western Arctic boundary current at 152ºW: Structure, variability, and transport
From August 2002 to September 2004 a high-resolution mooring array was maintained across the western Arctic boundary current in the Beaufort Sea north of Alaska. The array consisted of profiling instrumentation, providing a timeseries of vertical sections of the current. Here we present the first-ye...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.464.1928 2023-05-15T14:51:09+02:00 The western Arctic boundary current at 152ºW: Structure, variability, and transport Anna Nikolopoulosa Robert S. Pickarta Paula S. Fratantonia Koji Shimadab Daniel J. Torresa E. Peter Jonesc The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.464.1928 http://darchive.mblwhoilibrary.org:8080/bitstream/handle/1912/3119/Nikolopoulos_etal_all.pdf?sequence=1 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.464.1928 http://darchive.mblwhoilibrary.org:8080/bitstream/handle/1912/3119/Nikolopoulos_etal_all.pdf?sequence=1 Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://darchive.mblwhoilibrary.org:8080/bitstream/handle/1912/3119/Nikolopoulos_etal_all.pdf?sequence=1 Polar oceanography Shelf edge dynamics Boundary currents Volume transport Pacific Water Atlantic Water Regional terms Arctic Ocean Beaufort Sea Chukchi Sea text ftciteseerx 2016-01-08T06:48:17Z From August 2002 to September 2004 a high-resolution mooring array was maintained across the western Arctic boundary current in the Beaufort Sea north of Alaska. The array consisted of profiling instrumentation, providing a timeseries of vertical sections of the current. Here we present the first-year velocity measurements, with emphasis on the Pacific water component of the current. The mean flow is characterized as a bottom-intensified jet of O(15 cm s-1) directed to the east, trapped to the shelfbreak near 100 m depth. Its width scale is only 10-15 km. Seasonally the flow has distinct configurations. During summer it becomes surface-intensified as it advects buoyant Alaskan Coastal Water. In fall and winter the current often reverses (flows westward) under upwelling-favorable winds. Between the storms, as the eastward flow re-establishes, the current develops a deep extension to depths exceeding 700 m. In spring the bottom-trapped flow advects winter-transformed Pacific water emanating from the Chukchi Sea. The year-long mean volume transport of Pacific Water is 0.13±0.08 Sv to the east, which is less than 20 % of the long-term mean Bering Strait inflow. This implies that most of the Pacific water entering the Arctic goes elsewhere, contrary to expected dynamics and previous modeling results. Possible reasons for this are discussed. The mean Atlantic water transport (to 800 m depth) is 0.047±0.026 Sv, also smaller than anticipated. 1 Text Arctic Arctic Ocean Beaufort Sea Bering Strait Chukchi Chukchi Sea Alaska Unknown Arctic Arctic Ocean Bering Strait Chukchi Sea Pacific |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Polar oceanography Shelf edge dynamics Boundary currents Volume transport Pacific Water Atlantic Water Regional terms Arctic Ocean Beaufort Sea Chukchi Sea |
spellingShingle |
Polar oceanography Shelf edge dynamics Boundary currents Volume transport Pacific Water Atlantic Water Regional terms Arctic Ocean Beaufort Sea Chukchi Sea Anna Nikolopoulosa Robert S. Pickarta Paula S. Fratantonia Koji Shimadab Daniel J. Torresa E. Peter Jonesc The western Arctic boundary current at 152ºW: Structure, variability, and transport |
topic_facet |
Polar oceanography Shelf edge dynamics Boundary currents Volume transport Pacific Water Atlantic Water Regional terms Arctic Ocean Beaufort Sea Chukchi Sea |
description |
From August 2002 to September 2004 a high-resolution mooring array was maintained across the western Arctic boundary current in the Beaufort Sea north of Alaska. The array consisted of profiling instrumentation, providing a timeseries of vertical sections of the current. Here we present the first-year velocity measurements, with emphasis on the Pacific water component of the current. The mean flow is characterized as a bottom-intensified jet of O(15 cm s-1) directed to the east, trapped to the shelfbreak near 100 m depth. Its width scale is only 10-15 km. Seasonally the flow has distinct configurations. During summer it becomes surface-intensified as it advects buoyant Alaskan Coastal Water. In fall and winter the current often reverses (flows westward) under upwelling-favorable winds. Between the storms, as the eastward flow re-establishes, the current develops a deep extension to depths exceeding 700 m. In spring the bottom-trapped flow advects winter-transformed Pacific water emanating from the Chukchi Sea. The year-long mean volume transport of Pacific Water is 0.13±0.08 Sv to the east, which is less than 20 % of the long-term mean Bering Strait inflow. This implies that most of the Pacific water entering the Arctic goes elsewhere, contrary to expected dynamics and previous modeling results. Possible reasons for this are discussed. The mean Atlantic water transport (to 800 m depth) is 0.047±0.026 Sv, also smaller than anticipated. 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Anna Nikolopoulosa Robert S. Pickarta Paula S. Fratantonia Koji Shimadab Daniel J. Torresa E. Peter Jonesc |
author_facet |
Anna Nikolopoulosa Robert S. Pickarta Paula S. Fratantonia Koji Shimadab Daniel J. Torresa E. Peter Jonesc |
author_sort |
Anna Nikolopoulosa |
title |
The western Arctic boundary current at 152ºW: Structure, variability, and transport |
title_short |
The western Arctic boundary current at 152ºW: Structure, variability, and transport |
title_full |
The western Arctic boundary current at 152ºW: Structure, variability, and transport |
title_fullStr |
The western Arctic boundary current at 152ºW: Structure, variability, and transport |
title_full_unstemmed |
The western Arctic boundary current at 152ºW: Structure, variability, and transport |
title_sort |
western arctic boundary current at 152ºw: structure, variability, and transport |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.464.1928 http://darchive.mblwhoilibrary.org:8080/bitstream/handle/1912/3119/Nikolopoulos_etal_all.pdf?sequence=1 |
geographic |
Arctic Arctic Ocean Bering Strait Chukchi Sea Pacific |
geographic_facet |
Arctic Arctic Ocean Bering Strait Chukchi Sea Pacific |
genre |
Arctic Arctic Ocean Beaufort Sea Bering Strait Chukchi Chukchi Sea Alaska |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Bering Strait Chukchi Chukchi Sea Alaska |
op_source |
http://darchive.mblwhoilibrary.org:8080/bitstream/handle/1912/3119/Nikolopoulos_etal_all.pdf?sequence=1 |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.464.1928 http://darchive.mblwhoilibrary.org:8080/bitstream/handle/1912/3119/Nikolopoulos_etal_all.pdf?sequence=1 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766322212160143360 |