Decomposition of Fast and Slow Cloud Responses to Quadrupled CO_(2)Forcing in BCC–AGCM2.0 over East Asia

作     者：Xixun ZHOU Bing XIE Hua ZHANG Jingyi HE Qi CHEN Xixun ZHOU;Bing XIE;Hua ZHANG;Jingyi HE;Qi CHEN

作者机构：State Key Laboratory of Severe WeatherChinese Academy of Meteorological SciencesBeijing 100081China University of Chinese Academy of SciencesBeijing 100049China Laboratory for Climate Studies of China Meteorological AdministrationNational Climate CenterBeijing 100081China 

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

年 卷 期：2022年第39卷第12期

页      面：2188-2202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 Key R&D Program of China(2017YFA0603502) the National Natural Science Foundation of China(Grant No.41905081) S&T Development Fund of CAMS(2021KJ004&2022KJ019) 

主　　题：cloud cover cloud forcing quadrupled CO_(2) fast and slow responses 

摘      要：In this study,the decomposed fast and slow responses of clouds to an abruptly quadrupled CO_(2)concentration(approximately 1139 ppmv)in East Asia(EA)are obtained quantitatively by using a general circulation model,BCC–*** results show that in the total response,the total cloud cover(TCC),low cloud cover(LCC),and high cloud cover(HCC)all increased north of 40°N and decreased south of 40°N except in the Tibetan Plateau(TP).The mean changes of the TCC,LCC,and HCC in EA were–0.74%,0.38%,and–0.38%in the total response,respectively;1.05%,–0.03%,and 1.63%in the fast response,respectively;and–1.79%,0.41%,and–2.01%in the slow response,*** comparison,we found that changes in cloud cover were dominated by the slow response in most areas in EA due to the changes in atmospheric temperature,circulation,and water vapor supply ***,the changes in the cloud forcing over EA related to the fast and slow responses were opposite to each other,and the final cloud forcing was dominated by the slow *** mean net cloud forcing(NCF)in the total response over EA was–1.80 W m^(–2),indicating a cooling effect which partially offset the warming effect caused by the quadrupled CO_(2).The total responses of NCF in the TP,south China(SC),and northeast China(NE)were–6.74 W m^(–2),6.11 W m^(–2),and–7.49 W m^(–2),***,the local effects of offsetting or amplifying warming were particularly obvious.