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Observations from the RAPID array near 26.5$^\circ$N indicate a linear decline in the AMOC over the past two decades, linked to contrasting boundary changes: a weakening western boundary contribution partly compensated by strengthening at…

Atmospheric and Oceanic Physics · Physics 2026-05-29 Qianjiang Xing , Shane Elipot , William E. Johns , Bablu Sinha , Jules Kajtar , Adam T. Blaker , Tillys Petit , Ben I. Moat , David A. Smeed

\textit{In situ} observations of transbasin deep ocean transports at $26^\circ$N show variability on monthly to decadal timescales (2004--2015). Satellite-based estimates of ocean bottom pressure from the Gravity Recovery and Climate…

Atmospheric and Oceanic Physics · Physics 2025-04-11 E. Frajka-Williams , F. Landerer , T. Lee

The Meridional Overturning Circulation (MOC) is a system of surface and deep currents encompassing all ocean basins, crucial to the Earth's climate. Detecting potential climatic changes in the MOC first requires a careful characterisation…

Atmospheric and Oceanic Physics · Physics 2022-08-26 Tomas Jonathan

The sensitivity of the Atlantic Meridional Overturning Circulation (AMOC) to changes in basin integrated net evaporation is highly dependent on the zonal salinity contrast at the southern border of the Atlantic. Biases in the freshwater…

Atmospheric and Oceanic Physics · Physics 2012-10-26 Andrea A. Cimatoribus , Matthijs den Toom , Sybren S. Drijfhout , Henk A. Dijkstra

The Atlantic Meridional Overturning Circulation (MOC) is a crucial part of the climate system because of its associated northward heat transport. The present-day MOC is sensitive to freshwater anomalies and may collapse to a state with a…

Atmospheric and Oceanic Physics · Physics 2015-06-19 Qing Yi Feng , Jan P. Viebahn , Henk A. Dijkstra

The Atlantic surface currents associated with the Atlantic Meridional Overturning Circulation (AMOC) play a central role in regulating Earth's climate, yet their large scale dynamical response to climate variability remains poorly…

Atmospheric and Oceanic Physics · Physics 2026-04-14 Han Huang , Ningning Tao , Hongyu Wang , Teng Liu , Fei Xie , Xichen Li , Yongwen Zhang , Niklas Boers , Jingfang Fan , Deliang Chen , Xiaosong Chen

The Meridional Overturning Circulation (MOC) in the Southern Ocean is investigated using hydrographic observations combined with satellite observations of sea-surface height. A three-dimensional (spatial and vertical) estimate of the…

Atmospheric and Oceanic Physics · Physics 2016-12-06 Christopher C. Chapman , Jean-Baptiste Sallée

Vertical motions across the ocean are central to processes, like CO$_2$ fixation, heat removal or pollutant transport, which are essential to the Earth's climate. This work explores 3D conveyor routes {associated with} the Atlantic…

Atmospheric and Oceanic Physics · Physics 2024-12-24 Renzo Bruera , Jezabel Curbelo , Guillermo Garcia-Sanchez , Ana M. Mancho

The Atlantic Meridional Overturning Circulation (AMOC) is a key component of the Earth's climate. Evidence indicates a twentieth-century weakening, and enhanced freshwater input to the subpolar North Atlantic may further reduce overturning…

Dynamical Systems · Mathematics 2026-03-13 John Bailie , Priya Subramanian , Bernd Krauskopf

The North Atlantic Oscillation (NAO) is a leading mode of atmospheric variability, affecting the North Atlantic Ocean on sub-seasonal to multi-decadal timescales. The NAO changes the atmospheric forcing at the ocean's surface, including…

Atmospheric and Oceanic Physics · Physics 2025-06-03 Dhruv Bhagtani , Andy McC. Hogg , Ryan M. Holmes , Navid C. Constantinou , Hemant Khatri

A defining feature of the present-day global overturning circulation (GOC) is the absence of deep water formation in the Pacific, in contrast to the Atlantic. This asymmetry, associated with higher surface salinities in the North Atlantic,…

Atmospheric and Oceanic Physics · Physics 2026-05-18 Elian Vanderborght , Oliver Mehling , Henk A. Dijkstra

Very weakly density-stratified, near-homogeneous 'NH' conditions are found in the deep Western Mediterranean Sea. Under these conditions, over vertical ranges of several hundreds of meters water temperature varies only a few 0.0001degrC and…

Atmospheric and Oceanic Physics · Physics 2026-01-09 Hans van Haren

The Atlantic Meridional Overturning Circulation (AMOC) distributes heat and salt into the Northern Hemisphere via a warm surface current toward the subpolar North Atlantic, where water sinks and returns southwards as a deep cold current.…

Dynamical Systems · Mathematics 2023-08-01 John Bailie , Bernd Krauskopf

The Atlantic Meridional Overturning Circulation (AMOC), a crucial ocean current system, could transition to a weak state. Despite severe associated climate impacts, assessing the AMOC's response under global warming and its proximity to…

Chaotic Dynamics · Physics 2026-03-09 Reyk Börner , Oliver Mehling , Jost von Hardenberg , Valerio Lucarini

In the stably stratified ocean, small-scale turbulence is important for vertical exchange and hence for the mixing of water masses and suspended matter. To observationally study turbulent motions and the buoyancy- and shear-generators…

Atmospheric and Oceanic Physics · Physics 2022-09-23 Hans van Haren

Projections from global climate models reveal a significant inter-model spread in future rainfall changes in the tropical Atlantic by the end of the 21st century, including alterations to the Intertropical Convergence Zone (ITCZ) and…

Atmospheric and Oceanic Physics · Physics 2024-12-02 Giada Cerato , Katinka Bellomo , Roberta D Agostino , Jost von Hardenberg

Like elsewhere in the deep-sea, life in the deep Mediterranean depends on turbulent exchange across the stable vertical density stratification for supply of nutrients and oxygen. Commonly modelled, turbulent exchange is inversely…

Atmospheric and Oceanic Physics · Physics 2023-11-23 Hans van Haren

There is strong evidence that the present-day Atlantic Meridional Overturning Circulation (AMOC) is in a bi-stable regime and hence it is important to determine probabilities and pathways for noise-induced transitions between its…

Atmospheric and Oceanic Physics · Physics 2024-08-27 Jelle Soons , Tobias Grafke , Henk A. Dijkstra

This article deals with the investigation of the influence of topography and coastlines on the dynamics of the depth averaged Antarctic Circumpolar Current (ACC), driven by wind and atmospheric pressure. This is achieved with the help of a…

Atmospheric and Oceanic Physics · Physics 2007-05-23 Vladimir N. Stepanov

A box model of the inter-hemispheric Atlantic meridional overturning circulation is developed, including a variable pycnocline depth for the tropical and subtropical regions. The circulation is forced by winds over a periodic channel in the…

Atmospheric and Oceanic Physics · Physics 2012-11-07 Andrea A. Cimatoribus , Sybren S. Drijfhout , Henk A. Dijkstra
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