早新生代温室气候及冰期气候转型的模拟研究

早新生代是地质史上最后一个温室气候期，随后南极冰盖形成，地球进入到晚新生代冰期。温室气候的成因和冰期气候转型的机制一直是国际相关学界关注的问题。评述国际上对此开展的古气候模拟，反映了早新生代温室气候受到了海洋和大陆的地理位置、暖海洋温盐环流和海洋热输送、太阳辐射和大气CO2浓度变化的作用和影响。古气候模拟还反映了早新生代温室气候转向冰期气候，受到了大洋通道改变和高原构造隆起、大气成分变化以及海陆生态系相互的作用和反馈。这些古气候模拟试验锁定在气候变化的关键时段和重要驱动因子，对测试地球内外驱动力和地球各圈层反馈作用提供了重要的科学依据；温室气候以及趋向冰期气候的模拟研究对探讨气候变化内在机制、预测未来气候具有重要意义。 

Reviews of Modelings of Green-house Climate and Ice-age Transformation in the Early Cenozoic

Early Cenozoic is the last green-house climate in geological history.With development of Antarctic ice-sheet,the Earth entered a glacial period of Late Cenozoic Ice Age.The causes of green-house climate and the transition to ice age have become an important issue in international paleoclimate modeling community.This paper reviews a series of Early Cenozoic climate simulations,discusses the climate model's developing,the boundary conditions and the experiment designs,and analyzes the impacts and feedbacks of atmospheric green-house gas,topography,oceans and terrestrial ecosystem on Early Cenozoic climate system.These modelings focused on the major factors of Early Cenozoic climate changes and tested the inner and external forcing in the Earth climate system,which provided us an understanding of the mechanisms in warm climate change and an important scientific basis for predicting the future climate changes.