用来估计冰期旋回中地球上发生气候变化的方法一般有两种,即测定钙质化石中O~(18)/O~(16)值以及分析花粉,动物群分布。然而,这些方法都受到若干因子的影响,在大多数情况中部不能明确地确定更新世冰期和间冰期旋回之间的温差的绝对最。不管是温度波动,还是由于冰川扩展的时期中大陆冰盖贮藏大量轻同位素水而产生的同位素变化,都会影响钙质化石中 There are two general methods used to estimate climatic changes in the glaciation cycle: O ~ (18) / O ~ (16), and the distribution of pollen and fauna in calcareous fossils. However, these methods are all affected by a number of factors, and in most cases, the absolute maximum of the temperature difference between the Pleistocene and interglacial cycles can not be clearly identified at the center. Whether it is temperature fluctuations or isotope changes due to the storage of large amounts of light isotope water in the continental ice sheet during the period of glacier expansion, it will affect the calcareous fossils