A global-scale multidecadal variability driven by Atlantic multidecadal oscillation

作     者：Young-Min Yang Soon-Il An Bin Wang Jae Heung Park Young-Min Yang;Soon-II An;Bin Wang;Jae Heung Park

作者机构：Department of Atmospheric ScienceKey Laboratory of Meteorological Disaster of Ministry of Education Joint International Research Laboratory of Climate and Environment Change Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters and Earth System Modeling Center Nanjing University of Information Science and Technology Department of Atmospheric Sciences and International Pacific Research Center University of Hawaii Department of Atmospheric Sciences and Irreversible Climate Change Research CenterYonsei University Division of Environmental Science and Engineering Pohang University of Science and Technology 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2020年第7卷第7期

页      面：1190-1197页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：supported directly by the National Research Foundation of Korea (NRF)(NRF-2018R1A5A1024958) the Initial Research Foundation of Nanjing University of Information Science and Technology (1091011901001) supported by the National Natural Science Foundation of China(41420104002) the National Key Research and Development Program of China (2016YFA0600401) as well as the National Science Foundation (Climate Dynamics Division)(AGS-1540783) NOAA/CVP (#NA15OAR4310177) 

主　　题：global-scale multidecadal variability Atlantic multidecadal oscillation atmospheric teleconnection interdecadal Pacific oscillation 

摘      要：Observational analysis shows that there is a predominant global-scale multidecadal variability(GMV) of sea-surface temperature(SST). Its horizontal pattern resembles that of the interdecadal Pacific oscillation(IPO) in the Pacific and the Atlantic multidecadal oscillation(AMO) in the Atlantic Ocean, which could affect global precipitation and temperature over the globe. Here, we demonstrate that the GMV could be driven by the AMO through atmospheric teleconnections and atmosphere–ocean coupling *** reveal a strong negative correlation when AMO leads GMV by approximately 4–8 *** experiments using a climate model driven by observed AMO signals reveal that the tropical Atlantic warm SST anomalies of AMO initiate anomalous cooling in the equatorial central-eastern Pacific through atmospheric teleconnections. Anticyclonic anomalies in the North and South Pacific induce equatorward winds along the coasts of North and South America, contributing to further cooling. The upper-ocean dynamics plays a minor role in GMV formation but contributes to a delayed response of the IPO to the AMO forcing. The possible impact of the GMV on AMO was also tested by prescribing only Pacific SST in the model; however, the model could not reproduce the observed phase relationship between the AMO and the GMV. These results support the hypothesis that the Atlantic Ocean plays a key role in the multidecadal variability of global SST.