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地球学报  2000 

桂林地区4万年来气候变化及其动力机制浅析

Keywords: 石笋,古气候记录,季风环流变化机制,桂林

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Abstract:

通过桂林灌阳响水岩1号石笋的测年和O、C同位素的详细研究,得出了桂林地区4万a来高分辨率的古气候变化的连续记录,并揭示了由末次冰期向全新世的突变过程和3次与Heinrich事件(H1、H2、H3)对应的气候突变事件。在此基础上,通过与GISP2冰芯记录、古海水表面温度记录、深海海底生物的O同位素记录和苏禄海沉积物O同位素记录的对比,认为我国古季风环流变化的直接动力机制是全球冰量的变化。

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