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首页> 外文期刊>Chinese science bulletin >Abrupt climate change of East Asian Monsoon at 130 kaBP inferred from a high resolution stalagmite delta~(18)O record
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Abrupt climate change of East Asian Monsoon at 130 kaBP inferred from a high resolution stalagmite delta~(18)O record

机译：由高分辨率石笋δ〜（18）O记录推断的东亚季风在130 kaBP的突然气候变化

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摘要

~(230)Th ages and oxygen isotope data of a stalagmite from Shanbao Cave in Hebei Province characterize the East Asian Monsoon precipitation from 133 to l27 ka. The decadal-scale high-resolution delta~(18)O record reveals a detailed transitional process from the Penultimate Glaciation to the Last Interglaciation. As established with ~(230)Th dates, the age of the Termination II is determined to be 129.5 +- 1.0 kaBP, which supports the Northern Hemisphere insolation as the triggers for the ice-age cycles. In our delta~(18)O record, the glacial/ interglacial fluctuation reaches about 4 per thousand, almost the same level as in other Asian Monsoon cave stalagmite delta~(18)O records. The transition of the glacial/interglacial period in our record can be recognized as four stepwise stages, among which, a rapid rise of monsoon precipitation follows the stage of "Termination II pause". The rapid rise is synchronous with the abrupt change of global methane concentration, which reflects that an increase in both Asian Monsoon precipitation and tropical wetland plays an important role in the global climate changes.
机译：河北山宝洞石笋的〜（230）年龄和氧同位素数据表征了东亚季风降水从133 ka到127 ka。年代际尺度的高分辨率δ〜（18）O记录揭示了从倒数第二个冰川到最后一个冰川的详细过渡过程。根据第（230）Th个日期确定，终止II的年龄确定为129.5±1.0 kaBP，这支持北半球的日照作用是冰河年龄周期的触发因素。在我们的δ〜（18）O记录中，冰川/间冰期波动达到每千分之四，几乎与其他亚洲季风洞穴石笋δ〜（18）O记录相同。在我们的记录中，冰川/间冰期的过渡可以识别为四个阶段性阶段，其中，季风降水的快速上升遵循“ Termination II暂停”阶段。快速上升与全球甲烷浓度的突然变化同步，这反映出亚洲季风降水和热带湿地的增加在全球气候变化中起着重要作用。

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