Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea
Using long-term moorings data together with wind and sea ice measurements, we document the characteristics and variations of upwelling in Barrow Canyon and investigate the upwelled Atlantic Water (AW) on the Chukchi Sea shelf and how it impacts the ice cover. Driven by strong northeasterly winds, up...
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2023
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5020692 2023-07-23T04:18:50+02:00 Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea Li, S. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020692 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3853 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020692 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-3853 2023-07-02T23:40:07Z Using long-term moorings data together with wind and sea ice measurements, we document the characteristics and variations of upwelling in Barrow Canyon and investigate the upwelled Atlantic Water (AW) on the Chukchi Sea shelf and how it impacts the ice cover. Driven by strong northeasterly winds, upwelling occurs more often in the cold months, and the occurrence tends to increase interannually since 2001. Over the 12-year mooring record at the mouth of Barrow Canyon, roughly 10% of the upwelling events can drive AW onto the Chukchi Sea shelf. Both AW and non-AW upwelling events have more occurrence and stronger strength in the cold months, but do not present a significant interannual trend. These variations are associated with the northeasterly winds. Comparing to the non-AW upwelling, the AW upwelling is generally characterized by more vertical displacement of the AW layer at the mouth of Barrow Canyon, and stronger up-canyon volume and heat transport. In the ice-covered period, these two types of upwelling have different consequences for forming polynyas on the shelf. Under similar wind forcing, the ice reduction appears confined in the coastal region in the non-AW upwelling events, while during AW upwelling events, the sea ice declines dramatically in the shelf interior with 15% more ice loss. It elucidates that the heat carried by the upwelled AW plays a considerable role in modulating the ice cover in the shelf interior. Conference Object Chukchi Chukchi Sea Sea ice GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Barrow Canyon ENVELOPE(-154.000,-154.000,72.500,72.500) Chukchi Sea |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Using long-term moorings data together with wind and sea ice measurements, we document the characteristics and variations of upwelling in Barrow Canyon and investigate the upwelled Atlantic Water (AW) on the Chukchi Sea shelf and how it impacts the ice cover. Driven by strong northeasterly winds, upwelling occurs more often in the cold months, and the occurrence tends to increase interannually since 2001. Over the 12-year mooring record at the mouth of Barrow Canyon, roughly 10% of the upwelling events can drive AW onto the Chukchi Sea shelf. Both AW and non-AW upwelling events have more occurrence and stronger strength in the cold months, but do not present a significant interannual trend. These variations are associated with the northeasterly winds. Comparing to the non-AW upwelling, the AW upwelling is generally characterized by more vertical displacement of the AW layer at the mouth of Barrow Canyon, and stronger up-canyon volume and heat transport. In the ice-covered period, these two types of upwelling have different consequences for forming polynyas on the shelf. Under similar wind forcing, the ice reduction appears confined in the coastal region in the non-AW upwelling events, while during AW upwelling events, the sea ice declines dramatically in the shelf interior with 15% more ice loss. It elucidates that the heat carried by the upwelled AW plays a considerable role in modulating the ice cover in the shelf interior. |
format |
Conference Object |
author |
Li, S. |
spellingShingle |
Li, S. Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea |
author_facet |
Li, S. |
author_sort |
Li, S. |
title |
Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea |
title_short |
Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea |
title_full |
Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea |
title_fullStr |
Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea |
title_full_unstemmed |
Upwelling of Atlantic Water in Barrow Canyon, Chukchi Sea |
title_sort |
upwelling of atlantic water in barrow canyon, chukchi sea |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020692 |
long_lat |
ENVELOPE(-154.000,-154.000,72.500,72.500) |
geographic |
Barrow Canyon Chukchi Sea |
geographic_facet |
Barrow Canyon Chukchi Sea |
genre |
Chukchi Chukchi Sea Sea ice |
genre_facet |
Chukchi Chukchi Sea Sea ice |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3853 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020692 |
op_doi |
https://doi.org/10.57757/IUGG23-3853 |
_version_ |
1772181488553426944 |