Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment
The Atlantic Meridional Overturning Circulation (AMOC) is a crucial component of the Earth's climate system due to its fundamental role in heat distribution, carbon and oxygen transport, and the weather. Other climate components, such as the atmosphere and sea ice, influence the AMOC. Evaluatin...
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ftbilinugalpubl:oai:ojs.pkp.sfu.ca:article/6070 2024-04-28T07:57:55+00:00 Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment Sancho, Lívia Passos, Elisa Cataldi, Marcio Paulo de Freitas Assad, Luiz Landau, Luiz 2024-01-18 application/pdf https://journals.bilpubgroup.com/index.php/jasr/article/view/6070 eng eng BILINGUAL PUBLISHING GROUP https://journals.bilpubgroup.com/index.php/jasr/article/view/6070/5087 https://journals.bilpubgroup.com/index.php/jasr/article/view/6070 Copyright © 2024 Lívia Sancho, Elisa Passos, Marcio Cataldi, Luiz Paulo de Freitas Assad, Luiz Landau https://creativecommons.org/licenses/by-nc/4.0 Journal of Atmospheric Science Research; Vol. 7 , Iss. 1 (January 2024); 40-58 2630-5119 AMOC Meridional cell Climate change Deep circulation CESM2 results CMIP6 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2024 ftbilinugalpubl 2024-04-05T00:29:30Z The Atlantic Meridional Overturning Circulation (AMOC) is a crucial component of the Earth's climate system due to its fundamental role in heat distribution, carbon and oxygen transport, and the weather. Other climate components, such as the atmosphere and sea ice, influence the AMOC. Evaluating the physical mechanisms of those interactions is paramount to increasing knowledge about AMOC's functioning. In this study, the authors used outputs from the Community Earth System Model version 2 and observational data to investigate changes in the AMOC and the associated physical processes. Two DECK experiments were evaluated: piControl and 1pctCO2 , with an annual increase of 1% of atmospheric CO2 . The analysis revealed a significant decrease in the AMOC, associated with changes in mixed layer depth and buoyancy in high latitudes of the North Atlantic, resulting in the shutdown of deep convection and potentially affecting the formation of North Atlantic Deep Water and Antarctic Bottom Water. A vital aspect observed in this study is the association between increased runoff and reduced water evaporation, giving rise to a positive feedback process. Consequently, the rates of freshwater spreading have intensified during this period, which could lead to an accelerated disruption of the AMOC beyond the projections of existing models. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Deep Water North Atlantic Sea ice Bilingual Publishing Co. (BPC): E-Journals |
institution |
Open Polar |
collection |
Bilingual Publishing Co. (BPC): E-Journals |
op_collection_id |
ftbilinugalpubl |
language |
English |
topic |
AMOC Meridional cell Climate change Deep circulation CESM2 results CMIP6 |
spellingShingle |
AMOC Meridional cell Climate change Deep circulation CESM2 results CMIP6 Sancho, Lívia Passos, Elisa Cataldi, Marcio Paulo de Freitas Assad, Luiz Landau, Luiz Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment |
topic_facet |
AMOC Meridional cell Climate change Deep circulation CESM2 results CMIP6 |
description |
The Atlantic Meridional Overturning Circulation (AMOC) is a crucial component of the Earth's climate system due to its fundamental role in heat distribution, carbon and oxygen transport, and the weather. Other climate components, such as the atmosphere and sea ice, influence the AMOC. Evaluating the physical mechanisms of those interactions is paramount to increasing knowledge about AMOC's functioning. In this study, the authors used outputs from the Community Earth System Model version 2 and observational data to investigate changes in the AMOC and the associated physical processes. Two DECK experiments were evaluated: piControl and 1pctCO2 , with an annual increase of 1% of atmospheric CO2 . The analysis revealed a significant decrease in the AMOC, associated with changes in mixed layer depth and buoyancy in high latitudes of the North Atlantic, resulting in the shutdown of deep convection and potentially affecting the formation of North Atlantic Deep Water and Antarctic Bottom Water. A vital aspect observed in this study is the association between increased runoff and reduced water evaporation, giving rise to a positive feedback process. Consequently, the rates of freshwater spreading have intensified during this period, which could lead to an accelerated disruption of the AMOC beyond the projections of existing models. |
format |
Article in Journal/Newspaper |
author |
Sancho, Lívia Passos, Elisa Cataldi, Marcio Paulo de Freitas Assad, Luiz Landau, Luiz |
author_facet |
Sancho, Lívia Passos, Elisa Cataldi, Marcio Paulo de Freitas Assad, Luiz Landau, Luiz |
author_sort |
Sancho, Lívia |
title |
Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment |
title_short |
Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment |
title_full |
Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment |
title_fullStr |
Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment |
title_full_unstemmed |
Evaluation of the mechanisms acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO2 experiment |
title_sort |
evaluation of the mechanisms acting on the atlantic meridional overturning circulation in cesm2 for the 1pctco2 experiment |
publisher |
BILINGUAL PUBLISHING GROUP |
publishDate |
2024 |
url |
https://journals.bilpubgroup.com/index.php/jasr/article/view/6070 |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Sea ice |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Sea ice |
op_source |
Journal of Atmospheric Science Research; Vol. 7 , Iss. 1 (January 2024); 40-58 2630-5119 |
op_relation |
https://journals.bilpubgroup.com/index.php/jasr/article/view/6070/5087 https://journals.bilpubgroup.com/index.php/jasr/article/view/6070 |
op_rights |
Copyright © 2024 Lívia Sancho, Elisa Passos, Marcio Cataldi, Luiz Paulo de Freitas Assad, Luiz Landau https://creativecommons.org/licenses/by-nc/4.0 |
_version_ |
1797590990361460736 |