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Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas

The warm-to-cold densification of Atlantic Water (AW) around the perimeter of the Nordic Seas is a critical component of the Atlantic Meridional Overturning Circulation (AMOC). However, it remains unclear how ongoing changes in air-sea heat flux impact this transformation. Here we use observational...

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Autores principales: Huang, Jie, Pickart, Robert S., Chen, Zhuomin, Huang, Rui Xin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9832023/
https://www.ncbi.nlm.nih.gov/pubmed/36627323
http://dx.doi.org/10.1038/s41467-023-35889-3
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author Huang, Jie
Pickart, Robert S.
Chen, Zhuomin
Huang, Rui Xin
author_facet Huang, Jie
Pickart, Robert S.
Chen, Zhuomin
Huang, Rui Xin
author_sort Huang, Jie
collection PubMed
description The warm-to-cold densification of Atlantic Water (AW) around the perimeter of the Nordic Seas is a critical component of the Atlantic Meridional Overturning Circulation (AMOC). However, it remains unclear how ongoing changes in air-sea heat flux impact this transformation. Here we use observational data, and a one-dimensional mixing model following the flow, to investigate the role of air-sea heat flux on the cooling of AW. We focus on the Norwegian Atlantic Slope Current (NwASC) and Front Current (NwAFC), where the primary transformation of AW occurs. We find that air-sea heat flux accounts almost entirely for the net cooling of AW along the NwAFC, while oceanic lateral heat transfer appears to dominate the temperature change along the NwASC. Such differing impacts of air-sea interaction, which explain the contrasting long-term changes in the net cooling along two AW branches since the 1990s, need to be considered when understanding the AMOC variability.
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spelling pubmed-98320232023-01-12 Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas Huang, Jie Pickart, Robert S. Chen, Zhuomin Huang, Rui Xin Nat Commun Article The warm-to-cold densification of Atlantic Water (AW) around the perimeter of the Nordic Seas is a critical component of the Atlantic Meridional Overturning Circulation (AMOC). However, it remains unclear how ongoing changes in air-sea heat flux impact this transformation. Here we use observational data, and a one-dimensional mixing model following the flow, to investigate the role of air-sea heat flux on the cooling of AW. We focus on the Norwegian Atlantic Slope Current (NwASC) and Front Current (NwAFC), where the primary transformation of AW occurs. We find that air-sea heat flux accounts almost entirely for the net cooling of AW along the NwAFC, while oceanic lateral heat transfer appears to dominate the temperature change along the NwASC. Such differing impacts of air-sea interaction, which explain the contrasting long-term changes in the net cooling along two AW branches since the 1990s, need to be considered when understanding the AMOC variability. Nature Publishing Group UK 2023-01-10 /pmc/articles/PMC9832023/ /pubmed/36627323 http://dx.doi.org/10.1038/s41467-023-35889-3 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Huang, Jie
Pickart, Robert S.
Chen, Zhuomin
Huang, Rui Xin
Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas
title Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas
title_full Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas
title_fullStr Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas
title_full_unstemmed Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas
title_short Role of air-sea heat flux on the transformation of Atlantic Water encircling the Nordic Seas
title_sort role of air-sea heat flux on the transformation of atlantic water encircling the nordic seas
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9832023/
https://www.ncbi.nlm.nih.gov/pubmed/36627323
http://dx.doi.org/10.1038/s41467-023-35889-3
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