青藏高原东部RM孔140ka以来湖泊碳酸盐同位素记录的古气候特征

被引：43

作者：

吴敬禄

王苏民

潘红玺

夏崴岚

机构：

[1] 中国科学院南京地理与湖泊研究所

来源：

中国科学(D辑:地球科学) | 1997年 / 03期

基金：

国家攀登计划;

关键词：

若尔盖盆地; 氧同位素; 气侯波动;

D O I：

暂无

中图分类号：

P532 [古气候学];

学科分类号：

摘要：

通过若尔盖盆地RM孔湖泊化学沉积碳酸盐氧、碳同位素代用指标,重建了该区近140ka以来的古气候演化历史,其中末次冰期气候至少存在有7次暖波动及5次冷事件,其波动特征可与冰芯及深海记录相比较;而末次间冰期内部的次级波动与格陵兰冰芯GRIP氧同位素记录相一致,早期的Eemian暖期也存在两次冷波动.研究结果揭示了末次间冰期和冰期气候的不稳定性.色素和碳酸盐含量指标也具有与氧同位素记录相似的结果.

引用

页码：255 / 259

页数：5

共 8 条

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