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| DOI | 10.1175/JCLI-D-23-0127.1 |
| The Hybrid Recharge Delayed Oscillator: A More Realistic El Nino Conceptual Model | |
| 发表日期 | 2024 |
| ISSN | 0894-8755 |
| EISSN | 1520-0442 |
| 起始页码 | 37 |
| 结束页码 | 9 |
| 卷号 | 37期号:9 |
| 英文摘要 | El Nifio-Southern Oscillation (ENSO) is the leading mode of climate interannual variability, with large socioeconomical and environmental impacts, potentially increasing with climate change. Improving its understanding may shed further light on its predictability. Here we revisit the two main conceptual models for explaining ENSO cyclic nature, namely, the recharge oscillator (RO) and the advective-reflective delayed oscillator (DO). Some previous studies have argued that these two models capture similar physical processes. Yet, we show here that they actually capture two distinct roles of ocean wave dynamics in ENSO's temperature tendency equation, using observations, reanalyses, and Climate Model Intercomparison Project (CMIP) models. The slow recharge/discharge process mostly influences central-eastern Pacific by favoring warmer equatorial undercurrent and equatorial upwelling, while the 6-month delayed advective-reflective feedback process dominates in the western-central Pacific. We thus propose a hybrid recharge delayed oscillator (RDO) that combines these two distinct processes into one conceptual model, more realistic than the RO or DO alone. The RDO eigenvalues (frequency and growth rate) are highly sensitive to the relative strengths of the recharge/discharge and delayed negative feedbacks, which have distinct dependencies to mean state. Combining these two feedbacks explains most of ENSO frequency diversity among models. Thanks to the two different spatial patterns involved, the RDO can even capture ENSO spatiotemporal diversity and complexity. We also develop a fully nonlinear and seasonal RDO, even more robust and realistic, investigating each nonlinear term. The great RDO sensitivity may explain the observed and simulated richness in ENSO's characteristics and predictability. |
| 英文关键词 | El Nino; Ocean dynamics; ENSO; Seasonal forecasting; Interannual variability; Tropical variability |
| 语种 | 英语 |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001195676400001 |
| 来源期刊 | JOURNAL OF CLIMATE
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/301070 |
| 作者单位 | Institut de Recherche pour le Developpement (IRD); Institut Polytechnique de Paris; Ecole Polytechnique; Museum National d'Histoire Naturelle (MNHN); Institut de Recherche pour le Developpement (IRD); Sorbonne Universite; Universite Paris Cite; University of New South Wales Sydney; University of Hawaii System; University of Hawaii Manoa; Leibniz Zentrum fur Marine Tropenforschung (ZMT) |
| 推荐引用方式 GB/T 7714 | . The Hybrid Recharge Delayed Oscillator: A More Realistic El Nino Conceptual Model[J],2024,37(9). |
| APA | (2024).The Hybrid Recharge Delayed Oscillator: A More Realistic El Nino Conceptual Model.JOURNAL OF CLIMATE,37(9). |
| MLA | "The Hybrid Recharge Delayed Oscillator: A More Realistic El Nino Conceptual Model".JOURNAL OF CLIMATE 37.9(2024). |
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