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Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam

Summer upwelling has often been observed off Vietnam in the South China Sea (SCS). Occasional disappearance of the upwelling has attracted much attention because it modulates the regional climate and harms surrounding fisheries. Fluctuations of the East Asian monsoon associated with El Niño are cons...

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Autores principales: Wang, You-Lin, Wu, Chau-Ron
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7415158/
https://www.ncbi.nlm.nih.gov/pubmed/32770007
http://dx.doi.org/10.1038/s41598-020-70147-2
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author Wang, You-Lin
Wu, Chau-Ron
author_facet Wang, You-Lin
Wu, Chau-Ron
author_sort Wang, You-Lin
collection PubMed
description Summer upwelling has often been observed off Vietnam in the South China Sea (SCS). Occasional disappearance of the upwelling has attracted much attention because it modulates the regional climate and harms surrounding fisheries. Fluctuations of the East Asian monsoon associated with El Niño are considered responsible for the weakened or abolished upwelling. However, analyses of observations performed in the present study were equivocal in terms of the dominant influence of El Niño. Based on long-term sea surface temperature data, we demonstrated that weak upwelling off Vietnam occurs more frequently during periods of accelerated global warming compared to warming hiatus periods. Warming signals in the Indian Ocean vanished relatively quickly during the hiatus period. The accompanying easterly anomalies south of the anomalous anticyclone (AAC) in the northwestern Pacific were also weakened, reducing the impact of the El Niño teleconnection on the SCS summer monsoon and thus preserving the regular post-summer upwelling off Vietnam during warming hiatus periods.
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spelling pubmed-74151582020-08-11 Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam Wang, You-Lin Wu, Chau-Ron Sci Rep Article Summer upwelling has often been observed off Vietnam in the South China Sea (SCS). Occasional disappearance of the upwelling has attracted much attention because it modulates the regional climate and harms surrounding fisheries. Fluctuations of the East Asian monsoon associated with El Niño are considered responsible for the weakened or abolished upwelling. However, analyses of observations performed in the present study were equivocal in terms of the dominant influence of El Niño. Based on long-term sea surface temperature data, we demonstrated that weak upwelling off Vietnam occurs more frequently during periods of accelerated global warming compared to warming hiatus periods. Warming signals in the Indian Ocean vanished relatively quickly during the hiatus period. The accompanying easterly anomalies south of the anomalous anticyclone (AAC) in the northwestern Pacific were also weakened, reducing the impact of the El Niño teleconnection on the SCS summer monsoon and thus preserving the regular post-summer upwelling off Vietnam during warming hiatus periods. Nature Publishing Group UK 2020-08-07 /pmc/articles/PMC7415158/ /pubmed/32770007 http://dx.doi.org/10.1038/s41598-020-70147-2 Text en © The Author(s) 2020 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/.
spellingShingle Article
Wang, You-Lin
Wu, Chau-Ron
Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam
title Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam
title_full Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam
title_fullStr Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam
title_full_unstemmed Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam
title_short Nonstationary El Niño teleconnection on the post-summer upwelling off Vietnam
title_sort nonstationary el niño teleconnection on the post-summer upwelling off vietnam
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7415158/
https://www.ncbi.nlm.nih.gov/pubmed/32770007
http://dx.doi.org/10.1038/s41598-020-70147-2
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