AMOC decline and recovery in a warmer climate

Author(s):Show less -

Nobre, Paulo ; Veiga, Sandro F. ; Giarolla, Emanuel ; Marquez, Andre L. ; da Silva, Manoel B. Jr Jr ; Capistrano, Vinicius B. ; Malagutti, Marta ; Fernandez, Julio P. R. ; Soares, Helena C. ; Bottino, Marcus J. ; Kubota, Paulo Y. ; Figueroa, Silvio N. ; Bonatti, Jose P. ; Sampaio, Gilvan ; Casagrande, Fernanda ; Costa, Mabel C. ; Nobre, Carlos A.

• Document type: Journal article
• Source: SCIENTIFIC REPORTS; v. 13, n. 1, p. 12-pg., 2023-09-23.

Abstract

This study presents novel insight into the mechanisms of Atlantic Meridional Overturning Circulation (AMOC) reduction and its recovery under a warmer climate scenario. An one-thousand-year-long numerical simulation of a global coupled ocean-ice-atmosphere climate model, subjected to a stationary atmospheric radiative forcing, depict a coherent picture of the Arctic sea ice melting as a trigger for the initial AMOC reduction, along with decreases in the northward fluxes of salt and heat. Further atmospheric-driven ocean processes contribute to an erosion of the stable stratification of the fresher, yet colder waters in the surface layers of the North Atlantic, contributing to the recovery of a permanently altered AMOC. (AU)

• FAPESP's process: 18/06204-0 - Implementation of software infrastructure for the development of the BESM-Eta models in the supercomputer system available at INPE/CPTEC
• Grantee: Manoel Baptista da Silva Junior
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
• FAPESP's process: 14/50848-9 - INCT 2014: INCT for Climate Change
• Grantee: Jose Antonio Marengo Orsini
• Support Opportunities: Research Program on Global Climate Change - Thematic Grants
• FAPESP's process: 09/50528-6 - Brazilian model of the global climate system
• Grantee: Carlos Afonso Nobre
• Support Opportunities: Research Program on Global Climate Change - Thematic Grants