三门峡王官与武威沙沟黄土记录中的末次间冰期向末次冰期转换期的暖性回返事件

A warm-return event during the transition of last interglacial-glacial cycle

河南三门峡王官剖面与甘肃武威沙沟剖面捕捉到了末次间冰期向末次冰期转换时期发生于72 ka前后持续时间约为2 ka的一暖性回返事件,两剖面的冬、夏季风替代指标对该暖性回返事件的反应在时间上大致同步(其时间段约为71-73 ka,在71.4-72.1 ka前后该暖性回返事件最强盛),暗示该暖性回返事件在东亚季风区可能是一普遍存在的气候突变事件.鉴于该暖性回返事件在全球其他地区的海洋、陆地、冰芯记录中也有较普遍的反映,我们认为该事件很可能是一次发生于气候转型期的全球普遍存在的暖性突变事件.

An nearly 2 ka warm-return event during the last interglacial-glacial transition was recorded at 72 ka BP by both Wangguan and Shagou loess sections, located in Sanmenxia, Henan Provience and Wuwei, Gansu Provience of China, respectively. Both the winter and summer monsoon proxies demonstrate that this warm-return event appear in the same time （nearly 71-73 ka） and the maximal period is 71.4-72.1 ka. This study suggests that there is a universal and abrupt warm-return event in the East Asian monsoon region. Compared with marine, land and ice core records, this event is a universal abrupt warm event in the transition period of last glacial-interglacial cycle.