神农架三宝洞倒数第二次冰期高分辨率石笋δ13C记录

被引：12

作者：

姜修洋 ^{[1
,2
]}

孔兴功 ^{[2
]}

汪永进 ^{[2
]}

程海 ^{[2
,3
]}

张春霞 ^{[2
]}

机构：

[1] 福建师范大学地理科学学院

[2] 南京师范大学地理科学学院

[3] Department of Geology and Geophysics, University of Minnesota

来源：

第四纪研究 | 2011年 / 31卷 / 01期

基金：

国家自然科学基金重点项目;

关键词：

三宝洞; δ13C; 倒数第二次冰期; DO事件;

D O I：

暂无

中图分类号：

P532 [古气候学];

学科分类号：

070903 ;

摘要：

基于神农架三宝洞两支石笋24个230Th年龄以及637个δ13C测试数据,建立了倒数第二次冰期191±1.8～133±0.6ka B.P.时段洞穴石笋高分辨率δ13C的时间序列。在冰期/间冰期尺度上,δ13C值振幅达4.5‰,整体变化趋势与全球冰量曲线类似。在倒数第二次冰期,石笋δ13C记录揭示出一系列较大振荡幅度的千年尺度气候事件,并且与北大西洋SST记录的倒数第二次冰期9个千年尺度冷暖事件一一对应,甚至在某些DO亚旋回事件上也具有一定的对应关系。倒数第二次冰期北大西洋6个冰漂碎屑事件也在三宝洞石笋δ13C记录中留有印迹。三宝洞石笋δ13C记录将末次冰期东亚季风气候与北大西洋气候的联系拓展至倒数第二次冰期,进一步说明倒数第二次冰期北大西洋温盐环流对季风气候仍然起着中重要的作用。

引用

页码：1 / 7

页数：7

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