Recognition of climatic effects of land use/land cover change under global warming  

作　　者：HUA WenJian CHEN HaiShan 

机构地区：[1]Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology [2]College of Atmospheric Science, Nanjing University of Information Science & Technology

出　　处：《Chinese Science Bulletin》2013年第31期3852-3858,共7页

基　　金：supported by the National Basic Research Program of China(2011CB952000);the Special Funds for Public Welfare of China(GYHY201206017);the National Natural Science Foundation of China(41075082and 41230422);a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

摘　　要：Greenhouse gas emissions and land use/land cover change(LUCC)are two human activities notably affecting climate change.Will temperature and precipitation increase significantly during global warming resulting in more pronounced LUCC climatic effects?Considering the interannual forcing of these two factors,the NCAR Community Atmosphere Model(CAM4.0)was used in this study to investigate the importance of climatological background to LUCC impacts.Experiments based on the difference in the background climate,the greenhouse gas concentrations in 1850 and in the present age indicate contrary changes in climate sensitivity through estimations of the radiative forcing associated with LUCC,which are 0.54°C/(W/m2)and 0.26°C/(W/m2),respectively.Therefore,the background climate appears to play an important role in the regional impact of LUCC,especially at higher latitudes.In addition,global warming predominantly influences snow-albedo feedback in the mid-latitudes,thus determining the impact of LUCC,whereas the regional difference in precipitation caused by global warming is responsible for the differing climate response to LUCC in the tropics and subtropics.Greenhouse gas emissions and land use/land cover change （LUCC） are two human activities notably affecting climate change. Will temperature and precipitation increase significantly during global warming resulting in more pronounced LUCC climatic effects？ Considering the interannual forcing of these two factors, the NCAR Community Atmosphere Model （CAM4.0） was used in this study to investigate the importance of climatological background to LUCC impacts. Experiments based on the difference in the background climate, the greenhouse gas concentrations in 1850 and in the present age indicate contrary changes in climate sensitivity through estimations of the radiative forcing associated with LUCC, which are 0.54~C/（W/m2） and -0.26~C/（W/m2）, respectively. Therefore, the background climate appears to play an important role in the regional impact of LUCC, especially at higher latitudes. In addition, global warming predominantly influences snow-albedo feedback in the mid-latitudes, thus determin- ing the impact of LUCC, whereas the regional difference in precipitation caused by global warming is responsible for the differing climate response to LUCC in the tropics and subtropics.

关 键 词：全球气候变暖 土地利用 土地覆被变化 气候效应 土地利用 土地覆盖变化 土地利用变化 亚热带地区 LUCC 温室气体排放 

分 类 号：P461[天文地球—大气科学及气象学] X16[环境科学与工程—环境科学]