青藏高原广布的湖泊敏感地记录着气候与环境变化过程的信息．因它在地球中、低纬度地区最少受人类活动干扰，环境的演化变迁忠实地反映了纯自然过程，因此继南、北极之后，青藏高原正在成为研究全球变化的新的热点地区．青藏高原上的湖泊绝大部分为封闭湖盆，湖泊水位的变化直 The wide-spread lakes on the Tibetan Plateau record sensitively the information on the process of climate and environmental change. Because it is the least affected by human activities in the low latitudes and in the earth, the evolution of the environment faithfully reflects purely natural processes. Therefore, following the South and North Pole, the Tibetan Plateau is becoming a new hot spot for studying global changes. Most of the lakes on the Qinghai-Tibet Plateau are closed lakes, and the changes of lakes are straight