大部分气候剧变的证据是采用分析格陵兰年度冰层的方式获得的。但由于主要的太阳辐射流投入了热带地区 ,同时给地球带来了热量和湿度的根本性变化。为了了解全球性的气候突变 ,非常需要该区的资料。特别重要的是确定发生在热带和高纬度地区的气候事件的准确的时间和顺序 ,但是 Most of the evidence of a catastrophic change is obtained by analyzing the Greenland’s annual ice sheet. However, due to the major solar radiation into the tropics, at the same time to bring the fundamental changes in the heat and humidity. In order to understand the global climate change, the information of the area is very much needed. Of particular importance is the precise timing and sequence of climate events occurring in the tropics and high latitudes, but