中国新仙女木事件的孢粉记录及冰消期以来生物群区重建

The existence of the Younger Dryas cold event has been known for a century. Numerous stratigraphic studies proved the cooling as characteristic of late-glacial pollen diagrams throughout Europe 11-10,000 14C years BP. While the magnitude, timing, distribution of this event has had considerable attention in Europe first, it is only in the last two decades that the focus has expanded to include the extra-European presence of the signal..It is difficult to correlate the signal of vegetational and climatic events in.various regions outside Europe for it must be relied on the accurate 14C.chronology.Based on the high resolution palynological record with the AMS14C.dating,this research will focus on the Younger Dryas event in China especially recorded in the deep sea deposits of the South China Sea, which conclude the abruot climatic change and the vegetational response during that period.With the Biomization procedure, we can translate the taxon information.information into a common language using the concept of “PFT” which is.designed in terms of basic biology(leaf form, habit, phenology) and bioclimate tolerance. Using this method, this research will try to reconstruct.the palaeovegetation evolution from the last deglaciation in the two latitude.in China.

利用AMS14C，以高精度孢粉学研究为主要手段，着重研究南中国海深海沉积物所记录的中国低纬度地区新仙女木气候突变事件的变化幅度、表现及植被对气候变化的响应。利用孢粉生物群区方法，重建末次冰消期以来中国低纬度生物群区演化序列。..