The impact of oceanic processes on the transient climate response: a tidal forcing experiment

作     者：Yi Yu Hailong Liu Pengfei Lin Jian Lan Yi Yu;Hailong Liu;Pengfei Lin;Jian Lan

作者机构：Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 510275China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid DynamicsInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China College of Earth SciencesUniversity of Chinese Academy of SciencesBeijing 100049China College of Oceanic and Atmospheric SciencesOcean University of ChinaQingdao 266003China Center for Ocean Mega-ScienceChinese Academy of SciencesQingdao266071China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2020年第39卷第1期

页      面：52-62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：The National Key Research and Development Program for Developing Basic Sciences under contract Nos2016YFC1401401 and 2016YFC1401601 the “Strategic Priority Research Program” of the Chinese Academy of Sciences under contract Nos XDA11010304,XDA05110302 and XDC01040100 the National Natural Science Foundation of China under contract Nos41576026,41576025,41776030 and 41931183 

主　　题：tidal forcing transient climate response ocean heat uptake Atlantic Meridional Overturning Circulation 

摘      要：In this study, the impact of oceanic processes on the sensitivity of transient climate change is investigated using two sets of coupled experiments with and without tidal forcing, which are termed ExpTide and ExpControl,respectively. After introducing tidal forcing, the transient climate response(TCR) decreases from 2.32 K to 1.90 K,and the surface air temperature warming at high latitudes decreases by 29%. Large ocean heat uptake efficiency and heat storage can explain the low TCR in ExpTide. Approximately 21% more heat is stored in the ocean in ExpTide(1.10×10^24 J) than in ExpControl(0.91×10^24 J). Most of the large ocean warming occurs in the upper 1 000 m between 60°S and 60°N, primarily in the Atlantic and Southern Oceans. This ocean warming is closely related to the Atlantic Meridional Overturning Circulation(AMOC). The initial transport at mid-and high latitudes and the decline in the AMOC observed in ExpTide are both larger than those observed in ExpControl. The spatial structures of AMOC are also different with and without tidal forcing in present experiments. The AMOC in ExpTide has a large northward extension. We also investigated the relationship between AMOC and TCR suggested by previous studies using the present experiments.