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- W4313443348 abstract "El Ni~no-Southern Oscillation (ENSO) is the most predominant interannual variability in the tropics, significantly impacting global weather and climate. In this paper, a framework of low-order conceptual models for the ENSO is systematically derived from a spatially-extended stochastic dynamical system with full mathematical rigor. The spatially-extended stochastic dynamical system has a linear, deterministic, and stable dynamical core. It also exploits a simple stochastic process with multiplicative noise to parameterize the intraseasonal wind burst activities. A principal component analysis based on the eigenvalue decomposition method is applied to provide a low-order conceptual model that succeeds in characterizing the large-scale dynamical and non-Gaussian statistical features of the eastern Pacific El Ni~no events. Despite the low dimensionality, the conceptual modeling framework contains outputs for all the atmosphere, ocean, and sea surface temperature components with detailed spatiotemporal patterns. This contrasts with many existing conceptual models focusing only on a small set of specified state variables. The stochastic versions of many state-of-the-art low-order models, such as the recharge-discharge and the delayed oscillators, become special cases within this framework. The rigorous derivation of such low-order models provides a unique way to connect models with different spatiotemporal complexities. The framework also facilitates understanding the instantaneous and memory effects of stochastic noise in contributing to the large-scale dynamics of the ENSO." @default.
- W4313443348 created "2023-01-06" @default.
- W4313443348 creator A5048480792 @default.
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- W4313443348 date "2022-12-29" @default.
- W4313443348 modified "2023-10-18" @default.
- W4313443348 title "Rigorous Derivation of Stochastic Conceptual Models for the El Ni~no-Southern Oscillation from a Spatially-Extended Dynamical System" @default.
- W4313443348 doi "https://doi.org/10.48550/arxiv.2212.14179" @default.
- W4313443348 hasPublicationYear "2022" @default.
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