【作者】 刘燕； 程正泉； 叶萌； 谢健标；

【Author】 Liu Yan,Cheng Zhengquan,Ye Meng,Xie Jianbiao Guangzhou Central Meteorological Observatory,510080

【机构】 广州中心气象台；

【摘要】 采用1951～2005年的广州气温以及NCEP再分析资料,分析了近55年来广州市气温变化情况以及成因,结果表明:广州在1980年代中期以来呈显著上升趋势,其中冬季最低气温增温最为显著;冬季低温(≤5℃)日数明显减少,夏季高温(≥35℃)日数则显著增加;500hPa高度场的异常升高、冬季风和夏季风强度的减弱与广州气温的升高有直接的关系,而城市化进程同样也在广州气温尤其是冬季最低气温的增温中起到不可忽视的作用。更多还原

【Abstract】 By use of Guangzhou temperature and NCEP reanalysis data from 1951-2005,study is carried out of Guangzhou temperature change and its probable cause.Evidence suggests that,Guangzhou temperature shows an obvious increase since the middle of 1980s,with the most prominent trend in winter minimal temperature.The number of low temperature day(≤5℃)in winter decreases obviously and that of high temperature day(≥35℃)in summer increases prominently.Results also show that,the increase in Guangzhou temperature has a direct relationship with the elevation of 500hPa fields and the weakening of winter and summer monsoon.And the role of urbanization process can’t be neglected in the increase of Guangzhou temperature,especially of winter minimal temperature.更多还原