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El Ni\~no Southern Oscillation (ENSO) is the Earth's strongest source of interannual climate variability. Although its center of action is in the tropical Pacific, it has significant influences on the climate at the planetary scale. ENSO is…

Atmospheric and Oceanic Physics · Physics 2025-12-05 Gian Luca Eusebi Borzelli , Cosimo Enrico Carniel , Sandro Carniel , Mauro Sclavo

The El Ni\~no-Southern Oscillation (ENSO) is a fluctuation in sea surface temperature (SST) and pressure across the equatorial Pacific Ocean with a period of 2-7 years. As the largest mode of interannual variability on Earth, ENSO shapes…

Atmospheric and Oceanic Physics · Physics 2026-03-05 PJ Tuckman , Da Yang

The Madden-Julian Oscillation (MJO) and the El Ni\~no-Southern Oscillation (ENSO) are two dominant modes of tropical climate variability, each with profound global weather impacts. While their individual dynamics have been widely studied,…

Atmospheric and Oceanic Physics · Physics 2025-07-22 Yinling Zhang , Nan Chen , Charlotte Moser

We apply a test for low-dimensional, deterministic dynamics to the Nino 3 time series for the El Nino Southern Oscillation (ENSO). The test is negative, indicating that the dynamics is high-dimensional/stochastic. However, application of…

Atmospheric and Oceanic Physics · Physics 2015-06-05 Tatjana Zivkovic , Kristoffer Rypdal

The El Ni\~no-Southern Oscillation (ENSO) is a mode of interannual variability in the coupled equatorial ocean/atmosphere Pacific. El Ni\~no describes a state in which sea surface temperatures in the eastern Pacific increase and upwelling…

Atmospheric and Oceanic Physics · Physics 2016-07-12 John Guckenheimer , Andrew Roberts , Axel Timmermann , Henk Dijkstra

The El Nino southern oscillation (ENSO) behavior can be effectively modeled as a response to a 2nd-order Mathieu/Hill differential equation with periodic coefficients describing sloshing of a volume of water. The forcing of the equation…

Atmospheric and Oceanic Physics · Physics 2020-09-01 Paul R. Pukite

The dynamics of the El Ni\~no-Southern Oscillation (ENSO) are succinctly captured by the Recharge Oscillator (RO) framework. However, to simulate ENSO realistically, careful choices must be made regarding the RO's key parameters. In…

Atmospheric and Oceanic Physics · Physics 2025-09-16 Sooman Han , Alexey Fedorov , Jérôme Vialard

Despite advances in climate modeling, simulating the El Ni\~no-Southern Oscillation (ENSO) remains challenging due to its spatiotemporal diversity and complexity. To address this, we build upon existing model hierarchies to develop a new…

Atmospheric and Oceanic Physics · Physics 2025-03-27 Jinyu Wang , Xianghui Fang , Nan Chen , Bo Qin , Mu Mu , Chaopeng Ji

The Southern Oscillation (ENSO) is modelled with the help of a simple model representing a classical damped oscillator forced by external forcing. Eastern Pacific sea surface temperature (SST) and the mean equatorial Pacific thermocline…

Atmospheric and Oceanic Physics · Physics 2007-05-23 Vladimir N. Stepanov

The impact of the El Ni\~no-Southern Oscillation (ENSO) on the extratropics is investigated in an idealized, reduced-order model that has a tropical and an extratropical module. Unidirectional ENSO forcing is used to mimick the atmospheric…

Atmospheric and Oceanic Physics · Physics 2021-07-07 Stéphane Vannitsem , Jonathan Demaeyer , Michael Ghil

The relation between El Ni\~{n}o-Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO) perplexes the researchers. Probably, this is due to the default choice on empirical orthogonal function (EOF) method whose outputs are merely…

Atmospheric and Oceanic Physics · Physics 2019-12-05 Jin-Liang Wang

The recharge oscillator (RO) model has been successfully used to understand different aspects of the El Ni\~no-Southern Oscillation (ENSO). Fitting the RO to observations and climate model simulations consistently suggests that ENSO is a…

Atmospheric and Oceanic Physics · Physics 2025-04-09 Elle Weeks , Eli Tziperman

We analyse the transitions between established phases of the El Ni\~no Southern Oscillation (ENSO) by surveying the daily data of the Southern Oscillation Index from an entropic viewpoint using the framework of stochastic Statistical…

Statistical Mechanics · Physics 2025-07-15 Sílvio M. Duarte Queirós

The El Ni\~no Southern Oscillation (ENSO) is the Earth's strongest climate fluctuation on inter-annual time-scales and has global impacts although originating in the tropical Pacific. Many point indices have been developed to describe ENSO…

Atmospheric and Oceanic Physics · Physics 2012-06-27 A. Mazzarella , A. Giuliacci , N. Scafetta

The solar activity provides an important impact not only on the intensity of cosmic rays but also on the earth environment. In this paper, a coupled oscillator model is proposed to explain the solar activity. By this model the 89 year…

Solar and Stellar Astrophysics · Physics 2018-06-26 Yasushi Muraki

We study the relationship between the El Ni\~no--Southern Oscillation (ENSO) and the Indian summer monsoon in ensemble simulations from state-of-the-art climate models, the Max Planck Institute Earth System Model (MPI-ESM) and the Community…

Atmospheric and Oceanic Physics · Physics 2020-11-16 Mátyás Herein , Gábor Drótos , Tamás Bódai , Frank Lunkeit , Valerio Lucarini

El Ni\~no Southern Oscillation (ENSO) diversity is characterized based on the longitudinal location of maximum sea surface temperature anomalies (SSTA) and amplitude in the tropical Pacific, as Central Pacific (CP) events are typically…

Atmospheric and Oceanic Physics · Physics 2024-05-15 Jakob Schlör , Felix Strnad , Antonietta Capotondi , Bedartha Goswami

The El Ni\~no Southern Oscillation (ENSO) is the dominant driver of interannual global climate variability and can lead to extreme weather events such as droughts or flooding. Recently, we have developed several statistical approaches for…

Atmospheric and Oceanic Physics · Physics 2026-02-17 Josef Ludescher , Jun Meng , Jingfang Fan , Armin Bunde , Hans Joachim Schellnhuber

El Ni\~no-Southern Oscillation (ENSO) exhibits significant impacts on the frequency of extreme weather events and its socio-economic implications prevail on a global scale. However, a fundamental gap still exists in understanding the…

Systems and Control · Electrical Eng. & Systems 2024-06-21 Long Huo , Xin Chen , Kaiwen Li , Fengying Cai , Jürgen Kurths

While deep-learning models have demonstrated skillful El Ni\~no Southern Oscillation (ENSO) forecasts up to one year in advance, they are predominantly trained on climate model simulations that provide thousands of years of training data at…

Machine Learning · Computer Science 2025-04-29 Jakob Schloer , Matthew Newman , Jannik Thuemmel , Antonietta Capotondi , Bedartha Goswami