Impact of the Surface Stress on the Volume and Freshwater Transport Through the Canadian Arctic Archipelago From a High-Resolution Numerical Simulation

• Main Authors: Grivault, Nathan, Hu, Xianmin, Myers, Paul G.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2018
• Subjects: Canadian Arctic Archipelago; Freshwater transport; Numerical modeling; Sea-ice dynamics; Surface stress; Volume transport; Arctic; Baffin Bay; Lancaster Sound; Nares; Parry; Arctic Archipelago; Baffin; Nares strait; Parry Channel; Queen Elizabeth Islands; Sea ice
• Online Access: https://era.library.ualberta.ca/items/64a40c41-c256-4a3b-9b37-5b7e9ec9d182; https://doi.org/10.7939/r3-zmx1-ev97

We use a numerical model forced with high temporal and spatial resolution atmospheric forcing to evaluate the volume and freshwater transport through the Canadian Arctic Archipelago (CAA). On average, the simulated inflow through the Queen Elizabeth Islands represents 40% of the transport entering the CAA through M’Clure Strait. The transport through Admunsden Gulf represents less than 10% of the total inflow. The impact of sea ice and winds on the volume and freshwater transports into and through this region is also investigated. At Nares Strait and West Lancaster Sound, the transport is overestimated due to too-mobile sea ice but different physical processes related to surface stress. The ice is driving larger ocean flow in the first case, while causing less flow reduction in the second case. While the transport through the Queen Elizabeth Islands responds to the changes in surface stress over the Beaufort Gyre and northern Baffin Bay, local surface stress opposed to the mean flow over the straits tends to reduce the throughflow transport. In Parry Channel and the southern CAA, the surface stress tends to enhance the transport and have a greater impact locally. Finally, the surface stress related to sea ice motion can significantly change the transport in the CAA during the winter months.