The time series of δ¹⁸O variation recorded by one reef coral from the South China Sea,two ice cores from Tibetan Plateau,and three stalagmites from central and eastern China since 1950 are analyzed and compared with meteorological data measured by local meteorological stations.The results show good consistence between δ¹⁸O records by ice core or coral and local average temperature variation,which means the δ¹⁸O records can indicate the temperature change in the past 50 years.The variation of δ¹⁸O records from stalagmites is correlated with temperature and precipitation,yet with different modes in different stalagmites.In the past 50 years,summer temperature in the Tibetan Plateau decreased during 1950s-1970s then increased from 1980s,which is indicated by δ¹⁸O variation recorded in ice cores.A continuous warming trend existed in annual sea temperature and sea surface temperature of the South China Sea,reflected by δ¹⁸O in reef coral.The δ¹⁸O from three stalagmites are all increasing in the past 50 years,the same tendency showed from δ¹⁸O in other stalagmites in Asia and the δ¹⁸O in precipitation as well.The δ¹⁸O variation in stalagmites is also in accordance with the change of summer monsoon index calculated by meteorological data,both of which indicate a weakening trend in the summer monsoon,and the trend is consistent in Asia.