一、重大意义地球系统科学是80年代以来国际地学界提出的一项重大的地球科学基础研究学科。这一学科的中心学术思想是:要真正理解发生于地球表层的环境和生态系统的全球性重大变化并把握和预测今后几十年、几百年以致更长时间尺度上的全球重大变化发展趋势,必须将地球作为一个整体来进行研究,即把地球表层环境和生态系统看作由陆地圈、水圈、冰雪圈、大气圈和 I. Significant Significance Earth System Science is a major discipline in earth science research proposed by the international geosciences since the 1980s. The central academic theme of this discipline is to truly understand the major global changes in the environment and ecosystems that have taken place on the surface of the earth and to grasp and predict the trends of major global changes over a longer period of time in the coming decades and centuries , We must study the Earth as a whole, that is, consider the Earth's surface environment and ecosystem as a combination of terrestrial, hydrosphere, cryosphere, atmosphere and