苏北盆地末次间冰期以来的气候变化记录

Climate Change in Northern Jiangsu Basin Since the Last Interglacial

通过对苏北盆地XH1钻孔上部25m沉积岩心的研究，重建了苏北盆地末次间冰期以来的气候环境变化。根据对苏北盆地XH1钻孔岩心地层年代、质量磁化率、孢粉的研究，可以较为清晰地划分出末次间冰期——深海氧同位素5阶段（25．0—16．5m）、末次冰期早冰阶——深海氧同位素4阶段（16．5～12．5m）、末次冰期间冰阶——深海氧同位素3阶段（12．5～9．5m）、末次冰期冰盛期——深海氧同位素2阶段（9．5～5．8m）、冰后期——深海氧同位素1阶段（5．8～0m）。XH1钻孔记录与深海沉积物氧同位素和古里雅冰心氧同位素的对比研究表明，它们之间有着较好的一致性，但苏北盆地XH1钻孔记录与我国西部古里雅冰心记录更为相似，这可能揭示了气候环境变化在全球背景下的区域性特征。

According to the composite analysis of mass susceptibility , sporo-pollen in the XH1 core in northern Jiangsu basin and dating result of ^14 C, the paleomagnetism suggests that paleoclimate changes can be distinguished into five stages distinctly： in depth of 25--16.5 m（Last interglacial period）, relatively humid period; 16.5--12.5 m（Early stadial of last glacial period）, relatively arid period; 12.5--9.5 m（Interstadial period）, relatively humid period; 9.5--5.8m（Last maximum glacial period）, relatively arid period; and 5.8--0 m（Late glacial period） , relatively humid period. After comparing the deposit record of the top 25 m core profile with records of Guliya ice cores and deep sea cores, it can be concluded that the evolvement of paleoclimate in XH1 core shows not only consistence with global characteristics, but also has its own speciality.