An assessment of the subduction rate in the CMIP6 historical experiment

作     者：Shan Liu Xueyi Jing Xingrong Chen Huijun Wang Shan Liu;Xueyi Jing;Xingrong Chen;Huijun Wang

作者机构：National Marine Environmental Forecasting CenterMinistry of Natural ResourcesBeijing100081China National Supercomputing Center in WuxiWuxi214315China Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science&TechnologyNanjing210044China Nansen-Zhu International Research CenterInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China 

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

年 卷 期：2023年第42卷第1期

页      面：44-60页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：The National Natural Science Foundation of China under contract Nos 42192561 and 41605052 the National Key Research and Development Program of China under contract No.2020YFA0608804 

主　　题：subduction rate CMIP6 climatology long-term trend 

摘      要：Subduction process is a dynamical bridge for the exchanges of heat between the atmosphere and subsurface ocean water,which is regarded as a central proxy for the ocean climate *** its key indicator in climate signals,it is of importance to examine the ability of a model to simulate the global subduction rate before investigating the climate *** this paper,we evaluated the ability of 21 climate models from Coupled Model Intercomparison Project Phase 6(CMIP6)in simulating the subduction *** general,the simulation ability of the models to the subduction climatology is better than that to the long-term variation *** on the comprehensive analysis of climatology distribution and long-term trend of the subduction rate,GISS-E2-1-G performs better in reproducing the subduction rate climatology and IPSL-CM6A-LR can simulate positive long-term trend for both the global mean subduction rate and the lateral induction term in the Antarctic Circumpolar Current(ACC)***,it is still challenging to capture both the distribution characteristics of the subduction climatology and the long-term temporal trend for the 21 CMIP6 *** addition,the model results demonstrate that,the ACC area is the major region contributing to the long-term trend of the global mean subduction *** analysis in this paper indicates that the poor simulation ability of reproducing the long-term trend of global mean subduction rate might be attributed to the ocean dynamics,for example,the zonal velocity at the bottom mixed layer and zonal gradient of mixed layer depth.