中文摘要：

基于现代全球变化研究中关于脆弱性和粮食安全的概念，把历史时期的粮食安全分解为粮食生产安全、粮食供给安全、粮食消费安全3个层次，以气候变化直接影响粮食生产水平为起点，分析气候变化－农（牧）业收成－食物的人均供给量－饥民－社会稳定性的驱动－响应链中的关键过程，指出气候变化影响的驱动－响应关系不能归结为简单的因果关系，诸如耕地、人口、政策、外来势力都会对气候变化的影响起着放大或抑制的作用。

英文摘要：

It is one of the core themes of the Past Global Change Sciences （PAGES） that to understand the mechanism and process of the past human-climate-ecosystem＇s interaction in various spatial and temporal scales in order to improve the understanding of contemporary climate change impacts and adaptation. The top- ic is also the important theme of historical man/milieu relationships that is a big issue of concern by geogra- phers. In this article, concepts of vulnerability and food security in the regime of Global Changes are used to il- lustrate historical climate change impact-response processes in China. Corresponding to the food access, food availability and food utilization, the food security of historical China is simplified to three levels of food pro- duction safety, food supply safety and food consumption safety. The food production safety was the base of food security which could reflect the social sensitivity to climate change. The food supply safety was the capac- ity of the society to accommodate the crisis of regional food security which could indicate the social capacity to response the impacts of climate change. The food consumption safety was the final state of food security. The insecurity of food consumption was essential for the occurrence of social instability impacted by climate change. The processes related to the impacts of climate change to grain productivity, food supply production se- curity, individual food security, and social security are discussed. For human society, climate change means the changes of climatic resources or disasters. Impacts of climate change occurred from the direct impact on the grain harvest, then transferred further up to the sub-systems of economy, population and society mainly though the impact-response chain of climate change, agriculture harvest per capita food supply, famine, and social sta- bility. However, the impact-response processes of climate change could not be attributed to a simple causality. The initial impact could be amplified or suppressed in fe