Effects of the coupling process on shortwave radiative feedback during ENSO in FGOALS-g

作     者：PU Ye TANG Yan-Li LI Li-Juan PU Ye;TANG Yan-Li;LI Li-Juan

作者机构：State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG)Institute of Atmospheric PhysicsChinese Academy of Sciences College of Earth ScienceUniversity of Chinese Academy of Sciences 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2016年第9卷第5期

页      面：337-342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 by the National Basic Research Program of China[973 Program,grant number 2015CB954102] the National Natural Sciences Foundation of China[grant number41205079] the China Postdoctoral Science Foundation[grant number 2016M591234] 

主　　题：Shortwave radiative feedback ENSO coupling effect GAMIL FGOALS-g 

摘      要：Satisfactory simulation of negative shortwave（SW） radiative feedback during ENSO in the equatorial Pacific remains a challenging issue for climate models. Previous studies have focused on specific physical processes in the atmospheric and/or oceanic model, but the coupling process in coupled models has not received much attention. To investigate the coupling effect on SW feedback, two versions of an AGCM and their corresponding coupled models are analyzed. Results indicate that the effects of the coupling process in the two versions lead to weakening and enhancement of the negative feedback in the earlier and new versions, respectively, mainly due to their different changes in cloud fraction feedback and dynamical feedback. Further examination of the nonlinearity of the feedback reveals that the opposite coupling effects in the two versions originate from their different responses to El Nio and to La Nia.