An 800-Km-Long Erosional Channel System as a Pathway for Antarctic Bottom Water Abyssal Flow Into the Northwest Atlantic

被引：0

作者：

Frey, D. I. ^{[1
,2
]}

Zuev, O. A. ^{[1
]}

Mekhova, O. S. ^{[1
]}

Fomin, V. V. ^{[3
,4
,5
]}

Morozov, E. G. ^{[1
]}

Krechik, V. A. ^{[1
]}

Borisov, D. G. ^{[1
]}

Salyuk, P. A. ^{[6
]}

Smirnova, D. A. ^{[1
]}

Ostroumova, S. A. ^{[1
]}

Diansky, N. A. ^{[3
,4
,7
]}

机构：

[1] Russian Acad Sci, Shirshov Inst Oceanol, Moscow, Russia

[2] Russian Acad Sci, Marine Hydrophys Inst, Sevastopol, Russia

[3] Zubov State Oceanog Inst, Moscow, Russia

[4] Russian Acad Sci, Marchuk Inst Numer Math, Moscow, Russia

[5] Hydrometeorol Res Ctr Russian Federat, Moscow, Russia

[6] Russian Acad Sci, VI Ilichev Pacific Oceanol Inst, Far Eastern Branch, Vladivostok, Russia

[7] Lomonosov Moscow State Univ, Fac Phys, Moscow, Russia

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS | 2025年 / 130卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

Abyssal circulation; deep-water channels; Antarctic Bottom Water; bottom currents; ADCP measurements; numerical modeling; OCEAN; BATHYMETRY;

D O I：

10.1029/2024JC021846

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

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.

引用

页数：12