Redrawing the Iceland-Scotland Overflow Water pathways in the North Atlantic.

Autor:	Zou S; Woods Hole Oceanographic Institution, Woods Hole, MA, USA. szou@whoi.edu., Bower A; Woods Hole Oceanographic Institution, Woods Hole, MA, USA. abower@whoi.edu., Furey H; Woods Hole Oceanographic Institution, Woods Hole, MA, USA., Susan Lozier M; Georgia Institute of Technology, Atlanta, GA, USA., Xu X; Center for Ocean-Atmosphere Prediction Studies, Florida State University, Tallahassee, FL, USA.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2020 Apr 20; Vol. 11 (1), pp. 1890. Date of Electronic Publication: 2020 Apr 20.
DOI:	10.1038/s41467-020-15513-4
Abstrakt:	Iceland-Scotland Overflow Water (ISOW) is a primary deep water mass exported from the Norwegian Sea into the North Atlantic as part of the global Meridional Overturning Circulation. ISOW has historically been depicted as flowing counter-clockwise in a deep boundary current around the subpolar North Atlantic, but this single-boundary-following pathway is being challenged by new Lagrangian observations and model simulations. We show here that ISOW leaves the boundary and spreads into the interior towards the central Labrador and Irminger basins after flowing through the Charlie-Gibbs Fracture Zone. We also describe a newly observed southward pathway of ISOW along the western flank of the Mid-Atlantic Ridge. The partitioning of these pathways is shown to be influenced by deep-reaching eddies and meanders of the North Atlantic Current. Our results, in tandem with previous studies, call for a revision in the historical depiction of ISOW pathways throughout the North Atlantic.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu