<正>As a 10-year international research programme jointly initiated by ICSU(International Council for Science),ISSC(International Social Science Council)and oth
Tree-ring based temperature reconstructions have successfully inferred the past inter-annual to millennium scales summer temperature variability. A clear relati
The characteristics of haze days and the climatic background are analyzed by using daily observations of haze,precipitation,mean and maximum wind speed of 664 m