青藏高原的隆升时间、隆升高度，是新生代地球系统演化中最具有争议的科学问题，有许多不同观点,关键是缺少准确测量古海拔高度的方法和指标。本项目计划以前期完成的青藏高原表土孢粉-植被海拔高度定量关系为基础,在完善校正古气候对植被海拔高度影响方法的基础上,重点分析高原中南部乌郁、错鄂剖面等晚中新世-第四纪地层孢粉样品，结合其它生物（植硅体）环境指标分析、年代学测定等，建立晚中新世-第四纪孢粉组合变化序列,恢复植被生态变化过程；利用高原现代孢粉-环境数据库-转换函数，定量估算晚中新世以来植被海拔高度变化过程；利用晚中新世以来同纬度低海拔温度与现今温度差，提供古气候较正后的晚中新世以来高原古海拔变化过程。本项目依托多年青藏高原表土花粉分析的工作积累，选择有限的目标，为探讨青藏高原隆升过程和隆升机制提供孢粉学的定量古高度证据，有希望在青藏高原新生代基础科学问题上找到新的突破点。

When and how uplift of the Qinghai-Tibet Plateau are the most controversial scientific issues in the evolution of the Earth system in Cenozoic Era. There have been many different hypotheses for these two issues, as lack of reliable methods and indicators to accurately measure the palaeo-altitude. This project plans to focus on pollen analysis of Late Miocene - Quaternary sediments from the Wu Yu, Ngoin in central and southern part of Plateau, in combination with other environmental indicators (e.g.phytoliths) and chronology determination. Pollen assemblage and vegetation ecological processes of Late Miocene - Quaternary will be established, and vegetation altitude changes will be calculated by using modern pollen - environmental database - transfer function. The process of palaeo-elevation change in the Qinghai-Tibet plateau will be corrected by using the temperature difference between late Miocene and present at the same latitude, low altitude areas. This project will provide quantitative palynological evidence for exploring the uplift mechanism of the Qinghai-Tibet Plateau, and finding the new breakthrough point in the basic science study of Cenozoic geology of the Tibetan Plateau.