A 48.5-ka climate record from Wulagai Lake in Inner Mongolia, Northeast China
A 48.5-ka climate record from Wulagai Lake in Inner Mongolia, Northeast China
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DOI：
10.1016/j.quaint.2014.04.006
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发表时间：
2014-05
影响因子：
2.2
通讯作者：
Zhitong Yu;Xingqi Liu;Yong Wang;Zhenqing Chi;Xiujun Wang;Haiyan Lan
中科院分区：
文献类型：
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作者：
Zhitong Yu;Xingqi Liu;Yong Wang;Zhenqing Chi;Xiujun Wang;Haiyan Lan
在内蒙古高原北方乌拉盖湖采集了3.6m长的沉积物柱样。粒度和550 °C烧失量（LOI 550）数据被用来重建海洋同位素阶段（MIS）3晚期以来的气候变化。在48.5 ~ 30 cal ka BP之间，气候总体温暖湿润，但在37.7 ~ 33.5 cal ka BP之间，气候被寒冷干燥所打断。30 ~ 11.5 cal ka BP之间气候寒冷干燥，尤其是末次盛冰期（LGM）。从11.5 cal ka BP开始到今天，气候总体上温暖潮湿。研究结果与中国黄土高原MIS 3晚期以来的气候记录基本一致，表明亚洲夏季风的加强和减弱对6月太阳辐射的高和低的响应是乌拉盖湖地区MIS 3晚期以来气候演变的主要机制。但自2.5 cal ka BP以来，乌拉盖湖的LOI 550含量有所增加，这可能是人类活动的结果。
A 3.6-m long sediment core was collected from Wulagai Lake in the Northern Inner Mongolia Plateau, Northeast China. Data of grain size and loss on ignition at 550 °C (LOI550) were used to reconstruct the climatic changes since the late Marine Isotope Stage (MIS) 3. The climate was generally warm and humid between 48.5 and 30 cal ka BP, but was interrupted by a cold and dry period between 37.7 and 33.5 cal ka BP. Cold and dry climate occurred between 30 and 11.5 cal ka BP, especially during the Last Glacial Maximum (LGM). Beginning at 11.5 cal ka BP until present day, the climate was generally warm and humid. Our results are similar to the climate records from the Chinese Loess Plateau since the late MIS 3, which indicates that intensification and weakness of the Asian summer monsoon responding to high and low June insolation are the main mechanism of climate evolution in Wulagai Lake area since the late MIS 3. However, LOI550 content increased in Wulagai Lake since 2.5 cal ka BP, which probably resulted from human activities.