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Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12008/48853 How to cite
Title: The South Atlantic Dipole via multichannel singular spectrum analysis
Authors: Manta Domínguez, Gastón
Bach, Eviatar
Talento, Stefanie
Barreiro, Marcelo
Speich, Sabrina
Ghil, Michael
Type: Artículo
Keywords: Atmospheric science, Climate change, Ocean sciences
Issue Date: 2024
Abstract: 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.
Publisher: Nature
IN: Scientific Reports, 2024, 14: 15534
Sponsors: ANII: POS_CFRA_2017_1_146868
Citation: Manta Domínguez, G, Bach, E, Talento, S [y otros autores]. "The South Atlantic Dipole via multichannel singular spectrum analysis". Scientific Reports. [en línea] 2024, 14: 15534. 10 h. DOI: 10.1038/s41598-024-62089-w
ISSN: 2045-2322
License: Licencia Creative Commons Atribución (CC - By 4.0)
Appears in Collections:Publicaciones académicas y científicas - Facultad de Ciencias

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