Liu Yu, male, born in 1963, doctor,  research fellow, doctor tutor and Director of Earth Environment Institute, CAS; winner of National Fund for Outstanding Youth and the State Council’s special allowance for experts with outstanding contributions.

　　 Mainly in climatologic research of tree ring ; published more than 70 Chinese and English papers; his research results of tree-ring stable isotope were appraised as the “ Curve most reliable in Asia and favorably comparable with tree ring isotope results from other three major continents in the world” by international authoritative experts in the field; he chaired more than 20 topics, including Class II topic of major topic under National Fund Committee,  key topic,  outstanding youth fund and Class II topics under 973 Program of the Ministry of Science & Technology, etc.

　　  He also keeps close international cooperation with Sweden, US, Germany, Russia and Korea, etc.