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DOI | 10.1029/2020GL087933 |
A Control of ENSO Transition Complexity by Tropical Pacific Mean SSTs Through Tropical-Subtropical Interaction | |
Fang, Shih-Wei; Yu, Jin-Yi | |
2020-05-10 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | El Nino-Southern Oscillation (ENSO) transitions from one event to another in complex ways. Using observational analyses and forced atmospheric model experiments, we show that a preceding ENSO event can activate a subtropical Pacific forcing mechanism to trigger another ENSO event during the following year. These tropical-subtropical Pacific interactions result in a cyclic ENSO transition if the two ENSO events are of opposite signs or a multiyear ENSO transition if they are of the same sign. The preceding ENSO event should excite deep convections in the tropical Pacific in order to activate the subtropical Pacific mechanism. This requirement enables mean temperatures in the cold tongue and warm pool to respectively control how easily the cyclic and multiyear transitions can occur. A future warmer tropical Pacific is projected to decrease the frequency of occurrence of multiyear ENSO transitions but increase the occurrence of cyclic ENSO transitions. Plain Language Summary El Nino-Southern Oscillation (ENSO) is one of the strongest climate variation phenomena in Earth's climate system, causing regional climate extremes and massive ecosystem impacts. An ENSO event can transition from one event to another in complex ways. An El Nino (La Nina) event can be preceded by a La Nina (El Nino) event to become a cyclic ENSO, by a neutral event to become an episodic ENSO, or by another El Nino (La Nina) event to become a multiyear ENSO. The complex nature of ENSO transition challenges our understanding of ENSO dynamics and its future responses to greenhouse warming. Here we show, using observational analyses, climate model simulations, and a novel framework focusing specifically on the onset processes of ENSO, that multiyear ENSO events related to the subtropical forcing are projected to decrease and cyclic ENSO events to increase as the climate warms. These changes in ENSO transition complexity are linked to the warming of the tropical Pacific mean state, which is a key factor controlling ENSO transitions through a series of tropical-subtropical interactions. |
英文关键词 | ENSO ENSO complexity ENSO transition ENSO asymmetry subtropical ENSO onset ENSO projection |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000551464800005 |
WOS关键词 | SEASONAL FOOTPRINTING MECHANISM ; SEA-SURFACE TEMPERATURE ; EL-NINO ; DEEP CONVECTION ; OCEAN ; MODEL ; VARIABILITY ; CLIMATE ; IMPACT ; PROJECTIONS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249125 |
专题 | 气候变化 |
作者单位 | Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA |
推荐引用方式 GB/T 7714 | Fang, Shih-Wei,Yu, Jin-Yi. A Control of ENSO Transition Complexity by Tropical Pacific Mean SSTs Through Tropical-Subtropical Interaction[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(12). |
APA | Fang, Shih-Wei,&Yu, Jin-Yi.(2020).A Control of ENSO Transition Complexity by Tropical Pacific Mean SSTs Through Tropical-Subtropical Interaction.GEOPHYSICAL RESEARCH LETTERS,47(12). |
MLA | Fang, Shih-Wei,et al."A Control of ENSO Transition Complexity by Tropical Pacific Mean SSTs Through Tropical-Subtropical Interaction".GEOPHYSICAL RESEARCH LETTERS 47.12(2020). |
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