Earth Sciences

Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel

L. Chafik, H. Hátún, et al.

Discover the hidden pathways of dense overflow waters flowing from the Nordic Seas to the Faroe Bank Channel, a crucial conduit for the Atlantic Meridional Overturning Circulation. This groundbreaking research reveals the vital role of anticyclonic wind forcing and the unexpected trajectory of these waters, conducted by Léon Chafik, Hjálmar Hátún, Joakim Kjellsson, Karin Margretha H. Larsen, Thomas Rossby, and Barbara Berx.

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Abstract

This study uses observational platforms and an eddy-resolving ocean model to discover an unrecognized deep flow of dense overflow waters from the Nordic Seas towards the Faroe Bank Channel (FBC). Anticyclonic wind forcing in the Nordic Seas, regulating basin circulation, is key to activating this pathway, particularly when overflow is unusually strong. The overflow, regardless of origin, primarily travels through a deep jet along the eastern Faroe-Shetland Channel slope, contrary to prior assumptions. This jet is the main conduit for overflow water feeding the AMOC's lower branch via the FBC.

Publisher

Nature Communications

Published On

Jul 24, 2020

Authors

Léon Chafik, Hjálmar Hátún, Joakim Kjellsson, Karin Margretha H. Larsen, Thomas Rossby, Barbara Berx

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