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  Network percolation provides early warnings of abrupt changes in coupled oscillatory systems: An explanatory analysis

Ehstand, N., Donner, R. V., López, C., Hernández-García, E. (2023): Network percolation provides early warnings of abrupt changes in coupled oscillatory systems: An explanatory analysis. - Physical Review E, 108, 5, 054207.
https://doi.org/10.1103/PhysRevE.108.054207

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???ViewItemFull_lblCiteItemAs???: https://publications.pik-potsdam.de/pubman/item/item_29190 ???ViewItemFull_lblCiteItemVersionAs???: https://publications.pik-potsdam.de/pubman/item/item_29190_2
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 ???ViewItemFull_lblCreators???:
Ehstand, Noémie1, ???ENUM_CREATORROLE_AUTHOR???
Donner, Reik V.2, ???ENUM_CREATORROLE_AUTHOR???           
López, Cristóbal1, ???ENUM_CREATORROLE_AUTHOR???
Hernández-García, Emilio1, ???ENUM_CREATORROLE_AUTHOR???
???ViewItemFull_lblAffiliations???:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, Potsdam, ou_persistent13              

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 ???ViewItemFull_lblAbstract???: Functional networks are powerful tools to study statistical interdependency structures in spatially extended or multivariable systems. They have been used to get insights into the dynamics of complex systems in various areas of science. In particular, percolation properties of correlation networks have been employed to identify early warning signals of critical transitions. In this work, we further investigate the corresponding potential of percolation measures for the anticipation of different types of sudden shifts in the state of coupled irregularly oscillating systems. As a paradigmatic model system, we study the dynamics of a ring of diffusively coupled noisy FitzHugh-Nagumo oscillators and show that, when the oscillators are nearly completely synchronized, the percolation-based precursors successfully provide very early warnings of the rapid switches between the two states of the system. We clarify the mechanisms behind the percolation transition by separating global trends given by the mean-field behavior from the synchronization of individual stochastic fluctuations. We then apply the same methodology to real-world data of sea surface temperature anomalies during different phases of the El Niño-Southern Oscillation. This leads to a better understanding of the factors that make percolation precursors effective as early warning indicators of incipient El Niño and La Niña events.

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???ViewItemFull_lblLanguages???: eng - English
 ???ViewItemFull_lblDates???: 2023-11-072023-11-07
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 ???ViewItemFull_lblIdentifiers???: ???ENUM_IDENTIFIERTYPE_DOI???: 10.1103/PhysRevE.108.054207
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???ViewItemFull_lblSourceTitle???: Physical Review E
???ViewItemFull_lblSourceGenre???: ???ENUM_GENRE_JOURNAL???, SCI, Scopus, p3
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???ENUM_IDENTIFIERTYPE_PUBLISHER???: American Physical Society (APS)