supported by the Major State Basic Research Development Program of China (Grant No. 2010CB950103);the National Natural Science Foundation of China (Grant No. 41371201);the Strategic Project of Science and Technology of the Chinese Academy of Sciences (Grant No. XDA05080102)
Because of the complexity of social responses to climate change,as well as limitations of proxy data concerning interactions between climate change and human responses,the social impacts of past climate change and ass...