Biological and Environmental Research - Earth and Environmental System Sciences
Earth and Environmental System Modeling

The Atlantic Meridional Overturning Circulation in High‐Resolution Models

TitleThe Atlantic Meridional Overturning Circulation in High‐Resolution Models
Publication TypeJournal Article
Year of Publication2020
AuthorsHirschi, Joel J. - M., Barnier Bernard, Boning Claus, Biastoch Arne, Blaker Adam T., Coward Andrew, Danilov Sergey, Drijfhout Sybren S., Getzlaff Klaus, Griffies Stephen M., Hasumi Hiroyasu, Hewitt Helene, Iovino Doroteaciro, Kawasaki Takao, Kiss Andrew E., Koldunov Nikolay, Marzocchi Alice, Mecking Jennifer V., Moat Ben, Molines Jean‐Marc, Myers Paul G., Penduff Thierry, Roberts Malcolm, Treguier Anne‐Marie, Sein Dmitry V., Sidorenko Dmitry, Small Justin, Spence Paul, Thompson LuAnne, Weijer Wilbert, and Xu Xiaobiao
JournalJournal of Geophysical Research: Oceans
Volume125
Abstract / Summary

The Atlantic meridional overturning circulation (AMOC) represents the zonally integrated stream function of meridional volume transport in the Atlantic Basin. The AMOC plays an important role in transporting heat meridionally in the climate system. Observations suggest a heat transport by the AMOC of 1.3 PW at 26°N—a latitude which is close to where the Atlantic northward heat transport is thought to reach its maximum. This shapes the climate of the North Atlantic region as we know it today. In recent years there has been significant progress both in our ability to observe the AMOC in nature and to simulate it in numerical models. Most previous modeling investigations of the AMOC and its impact on climate have relied on models with horizontal resolution that does not resolve ocean mesoscale eddies and the dynamics of the Gulf Stream/North Atlantic Current system. As a result of recent increases in computing power, models are now being run that are able to represent mesoscale ocean dynamics and the circulation features that rely on them. The aim of this review is to describe new insights into the AMOC provided by high‐resolution models. Furthermore, we will describe how high‐resolution model simulations can help resolve outstanding challenges in our understanding of the AMOC.

URLhttps://doi.org/10.1029/2019JC015522
DOI10.1029/2019JC015522
Journal: Journal of Geophysical Research: Oceans
Year of Publication: 2020
Volume: 125
Publication Date: 01/2020

The Atlantic meridional overturning circulation (AMOC) represents the zonally integrated stream function of meridional volume transport in the Atlantic Basin. The AMOC plays an important role in transporting heat meridionally in the climate system. Observations suggest a heat transport by the AMOC of 1.3 PW at 26°N—a latitude which is close to where the Atlantic northward heat transport is thought to reach its maximum. This shapes the climate of the North Atlantic region as we know it today. In recent years there has been significant progress both in our ability to observe the AMOC in nature and to simulate it in numerical models. Most previous modeling investigations of the AMOC and its impact on climate have relied on models with horizontal resolution that does not resolve ocean mesoscale eddies and the dynamics of the Gulf Stream/North Atlantic Current system. As a result of recent increases in computing power, models are now being run that are able to represent mesoscale ocean dynamics and the circulation features that rely on them. The aim of this review is to describe new insights into the AMOC provided by high‐resolution models. Furthermore, we will describe how high‐resolution model simulations can help resolve outstanding challenges in our understanding of the AMOC.

DOI: 10.1029/2019JC015522
Citation:
Hirschi, JJ, B Barnier, C Boning, A Biastoch, AT Blaker, A Coward, S Danilov, et al.  2020.  "The Atlantic Meridional Overturning Circulation in High‐Resolution Models."  Journal of Geophysical Research: Oceans 125.  https://doi.org/10.1029/2019JC015522.