Impact of Spatial Inhomogeneity in Atmospheric CO_(2) Concentration on Surface Air Temperature Variations  

作　　者：Chengjun XIE Tongwen WU Jie ZHANG Weihua JIE Mengzhe ZHENG He ZHAO 

机构地区：[1]Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081 [2]University of Chinese Academy of Sciences,Beijing 100049 [3]China Meteorological Administration Key Open Laboratory of Transforming Climate Resource to Economy,Chongqing Climate Centre,Chongqing 401147 [4]CMA Earth System Modeling and Prediction Centre,China Meteorological Administration(CMA),Beijing 100081 [5]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081

出　　处：《Journal of Meteorological Research》2024年第5期969-982,共14页气象学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(42230608).

摘　　要：Atmospheric CO_(2) concentration is characterized by spatial inhomogeneity and seasonal variability.The response of surface air temperature(SAT)to the inhomogeneity in CO_(2) concentration globally and regionally remains elusive.In this study,the BCC-CSM2-MR climate model was used to investigate the differences in global SAT in response to the spatially inhomogeneous distribution of atmospheric CO_(2) concentration.The analysis was based on three historical experiments(Hist_1dCO_(2),Hist_2dCO_(2),and Hist_3dCO_(2))conducted separately under the forcing of globally homogeneous,zonally homogeneous,and wholly spatially inhomogeneous CO_(2) concentrations from 1850 to 2014,derived from 12 Earth System Models of the Coupled Model Intercomparison Project Phase 6.The simulation results revealed similar trends of evolution in the global mean SATs in the 20th century under the three CO_(2) concentration distributions,and showed that the simulated historical SATs considering the meridional inhomogeneity of CO_(2) concentration in Hist_2dCO_(2) and the wholly spatial inhomogeneity in Hist_3dCO_(2) were more consistent with the observations.Compared with the results of Hist_1dCO_(2),the SATs in Hist_2dCO_(2) were warmer over land in the mid–high latitudes of the Northern Hemisphere(NH)than over other land areas.Further consideration of the zonally inhomogeneous CO_(2) concentration in Hist_3dCO_(2) revealed generally colder SATs over the NH mid–high-latitude ocean than over land at the same latitudes,and even the zonal mean SATs in the NH were slightly colder than those in Hist_2dCO_(2).These differences are ascribed to the uneven distribution of CO_(2) concentration along the same latitude in the NH in Hist_3dCO_(2),which leads to strong large-scale fluctuations in the atmospheric circulation.Eurasia is the region with the highest concentration of atmospheric CO_(2),which leads to remarkable regional SAT warming owing to enhanced downward longwave radiation.Warmer SATs in Eurasia in winter will further strengthen the no

关 键 词：atmospheric CO_(2)concentration spatial inhomogeneity surface air temperature(SAT) IMPACT 

分 类 号：P461[天文地球—大气科学及气象学]