Reconstruct the paleoatmospheric CO2 concentration of the geological history is animportance issue for palaeobotanical and paleoenvironmental research.
通过气孔比率法重建地史时期的大气CO2浓度，是当前古植物学领域的重要课题。
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The Cenozoic fluvial strata, exposed widely in the Tanggula Mountains, detaily recorded the information of the uplift of the northern Tibet Plateau and the paleoenvironmental evolution.
The result indicated that this method was very useful to study the cycles of climatic change, which provides vital reference for paleoclimatic reconstruction and paleoenvironmental forecast.