статья в журнале

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Journal of Geophysical Research: Oceans

ISSN:21699275

2025

Zuev, O.A.¹

Mekhova, O.S.¹

Fomin, V.V.³

Morozov, E.G.¹

Krechik. V.A.¹

Borisov, D.G.¹

Salyuk, P.A.¹

Smirnova, D.A.¹

Ostroumova, S.A.¹

Diansky, N.A.³

10.1029/2024JC021846

The Antarctic Bottom Water flow through abyssal channels, fracture zones and troughs contributes to the lower limb of the global ocean meridional overturning circulation. These abyssal flows also control sedimentation processes and form channels, furrows, contourite drifts, and other erosional and depositional seafloor features. Here, we present new measurements that provide observational evidence of an abyssal flow along a more than 800-km-long erosional channel in the tropical Atlantic. Our measurements show that the discovered flow provides transport of the coldest abyssal waters into the Northwest Atlantic; the existence of the flow is also shown by a numerical model. The agreement between the observed and simulated flow structures provides a reliable estimate of the coldest water transport to the Northwest Atlantic, confirms the influence of erosional channels on bottom circulation, and increases our confidence in the ability of numerical models to simulate three-dimensional ocean circulation including its deepest layers

Abyssal circulation, ADCP measurements, Antarctic Bottom Water, bottom currents, deep-water channels, numerical modeling

2025-04-28 11:07:50