Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin
Pacific winter waters, a major source of nutrients and buoyancy to the Arctic Ocean, are thought to ventilate the Arctic's lower halocline either by injection (isopycnal or penetrative) of cold saline shelf waters, or by cooling and freshening Atlantic waters upwelled onto the shelf. Although v...
Main Authors: | , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English unknown |
Published: |
American Geophysical Union
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Subjects: | |
Online Access: | https://ir.library.oregonstate.edu/concern/articles/zw12z673q |
_version_ | 1829304195051683840 |
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author | Woodgate, Rebecca A. Aagaard, Knut Swift, James H. Falkner, Kelly Smethie, William M. |
author_facet | Woodgate, Rebecca A. Aagaard, Knut Swift, James H. Falkner, Kelly Smethie, William M. |
author_sort | Woodgate, Rebecca A. |
collection | ScholarsArchive@OSU (Oregon State University) |
description | Pacific winter waters, a major source of nutrients and buoyancy to the Arctic Ocean, are thought to ventilate the Arctic's lower halocline either by injection (isopycnal or penetrative) of cold saline shelf waters, or by cooling and freshening Atlantic waters upwelled onto the shelf. Although ventilation at salinity (S) > 34 psu has previously been attributed to hypersaline polynya waters, temperature, salinity, nutrient and tracer data suggest instead that much of the western Arctic's lower halocline is in fact influenced by a diapycnal mixing of Pacific winter waters (with S ~ 33.1 psu) and denser eastern Arctic halocline (Atlantic) waters, the mixing taking place possibly over the northern Chukchi shelf/slope. Estimates from observational data confirm that sufficient quantities of Atlantic water may be upwelled to mix with the inflowing Pacific waters, with volumes implying the halocline over the Chukchi Borderland region may be renewed on timescales of order a year. Keywords: Pacific ventilation, Arctic Ocean, diapycnal mixing Keywords: Pacific ventilation, Arctic Ocean, diapycnal mixing |
format | Article in Journal/Newspaper |
genre | Arctic Arctic Ocean Chukchi |
genre_facet | Arctic Arctic Ocean Chukchi |
geographic | Arctic Arctic Ocean Chukchi Borderland Chukchi Shelf Pacific |
geographic_facet | Arctic Arctic Ocean Chukchi Borderland Chukchi Shelf Pacific |
id | ftoregonstate:ir.library.oregonstate.edu:zw12z673q |
institution | Open Polar |
language | English unknown |
long_lat | ENVELOPE(-165.000,-165.000,77.000,77.000) ENVELOPE(-169.167,-169.167,70.550,70.550) |
op_collection_id | ftoregonstate |
op_relation | https://ir.library.oregonstate.edu/concern/articles/zw12z673q |
op_rights | Copyright Not Evaluated |
publisher | American Geophysical Union |
record_format | openpolar |
spelling | ftoregonstate:ir.library.oregonstate.edu:zw12z673q 2025-04-13T14:13:11+00:00 Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin Woodgate, Rebecca A. Aagaard, Knut Swift, James H. Falkner, Kelly Smethie, William M. https://ir.library.oregonstate.edu/concern/articles/zw12z673q English [eng] eng unknown American Geophysical Union https://ir.library.oregonstate.edu/concern/articles/zw12z673q Copyright Not Evaluated Article ftoregonstate 2025-03-18T01:59:22Z Pacific winter waters, a major source of nutrients and buoyancy to the Arctic Ocean, are thought to ventilate the Arctic's lower halocline either by injection (isopycnal or penetrative) of cold saline shelf waters, or by cooling and freshening Atlantic waters upwelled onto the shelf. Although ventilation at salinity (S) > 34 psu has previously been attributed to hypersaline polynya waters, temperature, salinity, nutrient and tracer data suggest instead that much of the western Arctic's lower halocline is in fact influenced by a diapycnal mixing of Pacific winter waters (with S ~ 33.1 psu) and denser eastern Arctic halocline (Atlantic) waters, the mixing taking place possibly over the northern Chukchi shelf/slope. Estimates from observational data confirm that sufficient quantities of Atlantic water may be upwelled to mix with the inflowing Pacific waters, with volumes implying the halocline over the Chukchi Borderland region may be renewed on timescales of order a year. Keywords: Pacific ventilation, Arctic Ocean, diapycnal mixing Keywords: Pacific ventilation, Arctic Ocean, diapycnal mixing Article in Journal/Newspaper Arctic Arctic Ocean Chukchi ScholarsArchive@OSU (Oregon State University) Arctic Arctic Ocean Chukchi Borderland ENVELOPE(-165.000,-165.000,77.000,77.000) Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Pacific |
spellingShingle | Woodgate, Rebecca A. Aagaard, Knut Swift, James H. Falkner, Kelly Smethie, William M. Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin |
title | Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin |
title_full | Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin |
title_fullStr | Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin |
title_full_unstemmed | Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin |
title_short | Pacific ventilation of the Artic Ocean's lower halocline by upwelling and diapycnal mixing over the continental margin |
title_sort | pacific ventilation of the artic ocean's lower halocline by upwelling and diapycnal mixing over the continental margin |
url | https://ir.library.oregonstate.edu/concern/articles/zw12z673q |