摘要
THE climatic instability was found by the oxygen isotope record in Greenland ice core（Green-land Ice Project（GRIP））during the Last Interglacial Period.It is regarded as greatprogress in research on the past global climatic change.The δ<sup>18</sup>O record reveals that thereexist two obvious cold events in the Eemian period,equivalent to substage 5e,and they werefurther confirmed by the lake record from Europe.But these shifts are not found in the icecore GISP2 and in the North Atlantic deep-sea sediment,casting doubt on whether
