Is there any imprint of the wind variability on the Atlantic Water circulation within the Arctic Basin?

• Published in: Geophysical Research Letters
• Main Authors: Lique, Camille, Johnson, Helen L.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Amer Geophysical Union 2015
• Subjects: Arctic; Arctic Basin; Sea ice
• Online Access: https://archimer.ifremer.fr/doc/00313/42420/41755.pdf; https://doi.org/10.1002/2015GL066141; https://archimer.ifremer.fr/doc/00313/42420/

The Atlantic Water (AW) layer in the Arctic Basin is isolated from the atmosphere by the overlaying surface layer, yet observations have revealed that the velocities in this layer exhibit significant variations. Here analysis of a global ocean/sea ice model hindcast, complemented by experiments performed with an idealized process model, is used to investigate what controls the variability of AW circulation, with a focus on the role of wind forcing. The AW circulation carries the imprint of wind variations, both remotely over the Nordic and Barents Seas where they force the AW inflow variability, and locally over the Arctic Basin through the forcing of the wind-driven Beaufort Gyre, which modulates and transfers the wind variability to the AW layer. The strong interplay between the circulation within the surface and AW layers suggests that both layers must be considered to understand variability in either.