Understanding the Development of the 2018/19 Central Pacific El Niño

作     者：Chengyang GUAN Xin WANG Haijun YANG Chengyang GUAN;Xin WANG;Haijun YANG

作者机构：College of Ocean Science and EngineeringShandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Tropical OceanographySouth China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)Guangzhou 511458China Innovation Academy of South China Sea Ecology and Environmental EngineeringChinese Academy of SciencesGuangzhou 510301China Department of Atmospheric and Oceanic SciencesFudan UniversityShanghai 200438China 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2023年第40卷第1期

页      面：177-185页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 0706[理学-大气科学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 41925024 and 41876021) Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB42000000) Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences (ISEE2021ZD01) Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0306) Natural Science Foundation of Shandong Province, China (Grant No. ZR2020QD065) 

主　　题：El Niño subtropical Pacific westerly anomalies Ekman transport 

摘      要：A central Pacific(CP)El Niño event occurred in 2018/19.Previous studies have shown that different mechanisms are responsible for different subtypes of CP El Niño events(CP-I El Niño and CP-II El Niño).By comparing the evolutions of surface winds,ocean temperatures,and heat budgets of the CP-I El Niño,CP-II El Niño,and 2018/19 El Niño,it is illustrated that the subtropical westerly anomalies in the North Pacific,which led to anomalous convergence of Ekman flow and surface warming in the central equatorial Pacific,played an important role in the 2018/19 El Niño event as well as in the CP-II El Niño.Although the off-equatorial forcing played a vital role,it is found that the equatorial forcing acted as a driving(damping)term in boreal spring(summer)of the 2018/19 El Niño.The 2018/19 El Niño provides a timely and vivid example that helps illustrate the proposed mechanism of the CP El Niño,which could be leveraged to improve El Niño predictability.