充分利用我国东北二叠纪安加拉植物化石资料，将其纳入由海相、海陆交互相地层和火山岩测年所控制的二叠纪年代地层格架。在此基础上，通过对植物（含孢粉和藻类）化石的分类学和生物地层学深入研究，建立东北地区二叠纪安加拉植物组合序列，并查明关键分类群的时代分布和演替规程；通过对植物体、干酪根等的碳同位素分析，建立东北地区二叠纪陆相地层有机碳碳同位素漂移曲线，探讨陆生植物与大气之间的相互作用，最终识别二叠纪中高纬度区陆生植物-大气碳循环系统从冰室气候到温室气候剧变中的响应，特别是陆生植物在这一系统中的作用和对策，探讨地史时期气候变化中的多因素耦合作用机制，为应对当今全球变暖提供借鉴。

Based on the Angara fossil plants data, the terrestrial Permian chronostratigraphic framework will be established under the control of marine and marine-terrestrial transitional strata, and isotopic dating of volcanic rocks in northeastern China. Furthermore, through systematic identification of fossil plants (including pollen, spores and algae) and careful studies of their biostratigraphic characters, a series of fossil plants assemblages will be established in ascending order. This would prompt us to ascertain the time spans of some key taxa (on the level of species and genera) and the procedure of vegetative succession. On the bases of carbon isotope analysis of plant remains and kerogen, bivalve shells, the Permian organic carbon isotopic excursion curve will be drawn from the terrestrial strata in northeastern China and used for discussing the influences of atmospheric carbon dioxide on the fossil plants and their feedback. Finally, in the middle and high latitude of Pangea, the response of Angara plants to Permian dramatic climatic changes from the ice-house climate to hot-house climate will be discerned in the carbon cycle between land plants and atmosphere, especially the most important role the terrestrial plants played and the strategies of the plants faced the climatic crisis. This will be a sole case in the earth history to reveal the multi-factor coupling mechanism of climatic changes from ice-house to hot-house, and to provide geological implication for facing the global warming in the future.