Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic
<p>In the coming decades increasing amounts of freshwater are predicted to enter the subpolar North Atlantic from Greenland and the Arctic. If this additional freshwater reaches the regions where deep convection occurs, it could potentially dampen ventilation and the formation of deep waters....
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2025-01-01
|
| Series: | Ocean Science |
| Online Access: | https://os.copernicus.org/articles/21/241/2025/os-21-241-2025.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832583538282594304 |
|---|---|
| author | E. Duyck N. P. Foukal E. Frajka-Williams |
| author_facet | E. Duyck N. P. Foukal E. Frajka-Williams |
| author_sort | E. Duyck |
| collection | DOAJ |
| description | <p>In the coming decades increasing amounts of freshwater are predicted to enter the subpolar North Atlantic from Greenland and the Arctic. If this additional freshwater reaches the regions where deep convection occurs, it could potentially dampen ventilation and the formation of deep waters. In this study, we use a surface drifter dataset spanning the period 1990–2023 to investigate the pathways followed by waters originating from Davis Strait and Hudson Strait on the Labrador shelf and into the interior subpolar North Atlantic. Recent drifter deployments in the region allow for an improved understanding of the circulation on the Labrador shelf, in particular its northern part, where prior data were sparse. We show that waters originating from Davis Strait and Hudson Strait remain on the shelf as they flow downstream until they reach the Newfoundland shelf. This confirms that very little exchange takes place between the Labrador shelf and the interior Labrador Sea. Decomposing the Labrador shelf into five regions, we further describe typical pathways for these waters and show that extensive exchanges take place between the coastal and shelf-break branches of the Labrador Current. Our results suggest that if an increasing amount of freshwater reaches the Labrador shelf, it would not directly affect the Labrador Sea convection region; instead, it would lead to the formation of a salinity anomaly off the Grand Banks, which could then circulate around the subpolar North Atlantic.</p> |
| format | Article |
| id | doaj-art-8babcd4615d945a7a1daa8eef5c46dde |
| institution | Kabale University |
| issn | 1812-0784 1812-0792 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Ocean Science |
| spelling | doaj-art-8babcd4615d945a7a1daa8eef5c46dde2025-01-28T11:38:23ZengCopernicus PublicationsOcean Science1812-07841812-07922025-01-012124126010.5194/os-21-241-2025Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North AtlanticE. Duyck0N. P. Foukal1E. Frajka-Williams2Institute of Oceanography, CEN, University of Hamburg, Hamburg, GermanySkidaway Institute of Oceanography, University of Georgia, Savannah, GA, USAInstitute of Oceanography, CEN, University of Hamburg, Hamburg, Germany<p>In the coming decades increasing amounts of freshwater are predicted to enter the subpolar North Atlantic from Greenland and the Arctic. If this additional freshwater reaches the regions where deep convection occurs, it could potentially dampen ventilation and the formation of deep waters. In this study, we use a surface drifter dataset spanning the period 1990–2023 to investigate the pathways followed by waters originating from Davis Strait and Hudson Strait on the Labrador shelf and into the interior subpolar North Atlantic. Recent drifter deployments in the region allow for an improved understanding of the circulation on the Labrador shelf, in particular its northern part, where prior data were sparse. We show that waters originating from Davis Strait and Hudson Strait remain on the shelf as they flow downstream until they reach the Newfoundland shelf. This confirms that very little exchange takes place between the Labrador shelf and the interior Labrador Sea. Decomposing the Labrador shelf into five regions, we further describe typical pathways for these waters and show that extensive exchanges take place between the coastal and shelf-break branches of the Labrador Current. Our results suggest that if an increasing amount of freshwater reaches the Labrador shelf, it would not directly affect the Labrador Sea convection region; instead, it would lead to the formation of a salinity anomaly off the Grand Banks, which could then circulate around the subpolar North Atlantic.</p>https://os.copernicus.org/articles/21/241/2025/os-21-241-2025.pdf |
| spellingShingle | E. Duyck N. P. Foukal E. Frajka-Williams Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic Ocean Science |
| title | Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic |
| title_full | Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic |
| title_fullStr | Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic |
| title_full_unstemmed | Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic |
| title_short | Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic |
| title_sort | circulation of baffin bay and hudson bay waters on the labrador shelf and into the subpolar north atlantic |
| url | https://os.copernicus.org/articles/21/241/2025/os-21-241-2025.pdf |
| work_keys_str_mv | AT eduyck circulationofbaffinbayandhudsonbaywatersonthelabradorshelfandintothesubpolarnorthatlantic AT npfoukal circulationofbaffinbayandhudsonbaywatersonthelabradorshelfandintothesubpolarnorthatlantic AT efrajkawilliams circulationofbaffinbayandhudsonbaywatersonthelabradorshelfandintothesubpolarnorthatlantic |