The South Atlantic Dipole via multichannel singular spectrum analysis
This study analyzes coupled atmosphere–ocean variability in the South Atlantic Ocean. To do so, we characterize the spatio-temporal variability of annual mean sea-surface temperature (SST) and sea-level pressure (SLP) using Multichannel Singular Spectrum Analysis (M-SSA). We applied M-SSA to ERA5 re...
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ftcaltechauth:oai:authors.library.caltech.edu:j386y-79x64 2024-09-15T18:36:30+00:00 The South Atlantic Dipole via multichannel singular spectrum analysis Manta, Gaston Bach, Eviatar Talento, Stefanie Barreiro, Marcelo Speich, Sabrina Ghil, Michael 2024-07-05 https://doi.org/10.1038/s41598-024-62089-w https://www.ncbi.nlm.nih.gov/pmc/PMC11229504 eng eng Nature Publishing Group https://doi.org/10.1038/s41598-024-62089-w oai:authors.library.caltech.edu:j386y-79x64 https://www.ncbi.nlm.nih.gov/pmc/PMC11229504 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Scientific Reports, 14, 15534, (2024-07-05) info:eu-repo/semantics/article 2024 ftcaltechauth https://doi.org/10.1038/s41598-024-62089-w 2024-08-06T15:35:05Z This study analyzes coupled atmosphere–ocean variability in the South Atlantic Ocean. To do so, we characterize the spatio-temporal variability of annual mean sea-surface temperature (SST) and sea-level pressure (SLP) using Multichannel Singular Spectrum Analysis (M-SSA). We applied M-SSA to ERA5 reanalysis data (1959–2022) of South Atlantic SST and SLP, both individually and jointly, and identified a nonlinear trend, as well as two climate oscillations. The leading oscillation, with a period of 13 years, consists of a basin-wide southwest–northeast dipole and is observed both in the individual variables and in the coupled analysis. This mode is reminiscent of the already known South Atlantic Dipole, and it is probably related to the Pacific Decadal Oscillation and to El Niño–Southern Oscillation in the Pacific Ocean. The second oscillation has a 5-year period and also displays a dipolar structure. The main difference between the spatial structure of the decadal, 13-year, and the interannual, 5-year mode is that, in the first one, the SST cold tongue region in the southeast Atlantic’s Cape Basin is included in the pole closer to the equator. Together, these two oscillatory modes, along with the trend, capture almost 40% of the total interannual variability of the SST and SLP fields, and of their co-variability. These results provide further insights into the spatio-temporal evolution of SST and SLP variability in the South Atlantic, in particular as it relates to the South Atlantic Dipole and its predictability. © The Author(s) 2024. 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated ... Article in Journal/Newspaper South Atlantic Ocean Caltech Authors (California Institute of Technology) Scientific Reports 14 1 |
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English |
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This study analyzes coupled atmosphere–ocean variability in the South Atlantic Ocean. To do so, we characterize the spatio-temporal variability of annual mean sea-surface temperature (SST) and sea-level pressure (SLP) using Multichannel Singular Spectrum Analysis (M-SSA). We applied M-SSA to ERA5 reanalysis data (1959–2022) of South Atlantic SST and SLP, both individually and jointly, and identified a nonlinear trend, as well as two climate oscillations. The leading oscillation, with a period of 13 years, consists of a basin-wide southwest–northeast dipole and is observed both in the individual variables and in the coupled analysis. This mode is reminiscent of the already known South Atlantic Dipole, and it is probably related to the Pacific Decadal Oscillation and to El Niño–Southern Oscillation in the Pacific Ocean. The second oscillation has a 5-year period and also displays a dipolar structure. The main difference between the spatial structure of the decadal, 13-year, and the interannual, 5-year mode is that, in the first one, the SST cold tongue region in the southeast Atlantic’s Cape Basin is included in the pole closer to the equator. Together, these two oscillatory modes, along with the trend, capture almost 40% of the total interannual variability of the SST and SLP fields, and of their co-variability. These results provide further insights into the spatio-temporal evolution of SST and SLP variability in the South Atlantic, in particular as it relates to the South Atlantic Dipole and its predictability. © The Author(s) 2024. 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated ... |
format |
Article in Journal/Newspaper |
author |
Manta, Gaston Bach, Eviatar Talento, Stefanie Barreiro, Marcelo Speich, Sabrina Ghil, Michael |
spellingShingle |
Manta, Gaston Bach, Eviatar Talento, Stefanie Barreiro, Marcelo Speich, Sabrina Ghil, Michael The South Atlantic Dipole via multichannel singular spectrum analysis |
author_facet |
Manta, Gaston Bach, Eviatar Talento, Stefanie Barreiro, Marcelo Speich, Sabrina Ghil, Michael |
author_sort |
Manta, Gaston |
title |
The South Atlantic Dipole via multichannel singular spectrum analysis |
title_short |
The South Atlantic Dipole via multichannel singular spectrum analysis |
title_full |
The South Atlantic Dipole via multichannel singular spectrum analysis |
title_fullStr |
The South Atlantic Dipole via multichannel singular spectrum analysis |
title_full_unstemmed |
The South Atlantic Dipole via multichannel singular spectrum analysis |
title_sort |
south atlantic dipole via multichannel singular spectrum analysis |
publisher |
Nature Publishing Group |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41598-024-62089-w https://www.ncbi.nlm.nih.gov/pmc/PMC11229504 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Scientific Reports, 14, 15534, (2024-07-05) |
op_relation |
https://doi.org/10.1038/s41598-024-62089-w oai:authors.library.caltech.edu:j386y-79x64 https://www.ncbi.nlm.nih.gov/pmc/PMC11229504 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.1038/s41598-024-62089-w |
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Scientific Reports |
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14 |
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1 |
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1810480167419641856 |