supported by the National Natural Science Foundation of China(Grant No.90102009);the Scientific Research Foundation for the Returned 0verseas Chinese Scholars,State Education Ministry,the Innovation Project of the Chinese Academy of Sciences(Grant No.KZCXI-10-05);973 project(Grant No.G1999043502).
As a good indicator of Holocene climate, the fluctuation of alpine timberline is a synthetical result of impacts of many environmental factors dur-ing geological and historical periods and modern times. As the dominan...