Single- and multi-year ENSO events controlled by pantropical climate interactions
Single- and multi-year ENSO events controlled by pantropical climate interactions
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DOI：
10.1038/s41612-022-00305-y
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发表时间：
2022-11
影响因子：
9
通讯作者：
Ji‐Won Kim;Jin‐Yi Yu
中科院分区：
文献类型：
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作者：
Ji‐Won Kim;Jin‐Yi Yu
为了更好地理解观测到的厄尔尼诺-南方涛动(ENSO)事件的不同时间演变，该研究考察了长达2200年的共同体地球系统模式第一版中的相似事件。结果表明，选择性地激活盆地间和盆地内的气候相互作用(即泛热带气候相互作用)控制着ENSO的演变模式。当ENSO优先激活与热带印度洋和/或大西洋的盆地间相互作用时，它在ENSO阶段引入负反馈，导致一年一次的演变。当ENSO优先激活与副热带北太平洋的盆内相互作用时，它会产生正反馈，产生多年的演变。确定了三个关键因素(发展季节强度、爆发前太平洋状况和最大纬向位置)及其阈值，它们决定了盆地间或盆地内的相互作用是否被激活，以及事件将成为单年事件还是多年事件。这些发现提供了一种通过结合泛热带气候相互作用的控制作用来预测ENSO演变模式的方法。
To better understand the diverse temporal evolutions of observed El Niño‒Southern Oscillation (ENSO) events, which are characterized as single- or multi-year, this study examines similar events in a 2200-year-long integration of Community Earth System Model, version 1. Results show that selective activation of inter- and intra-basin climate interactions (together, pantropical climate interactions) controls ENSO’s evolution pattern. When ENSO preferentially activates inter-basin interactions with tropical Indian and/or Atlantic Oceans, it introduces negative feedbacks into the ENSO phase, resulting in single-year evolution. When ENSO preferentially activates intra-basin interactions with subtropical North Pacific, it causes positive feedbacks, producing multi-year evolution. Three key factors (developing-season intensity, pre-onset Pacific condition, and maximum zonal location) and their thresholds, which determine whether inter- or intra-basin interactions are activated and whether an event will become a single- or multi-year event, are identified. These findings offer a way to predict ENSO’s evolution pattern by incorporating the controlling role of pantropical climate interactions.