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VEGETATION EVOLUTION DURING THE LAST PENULTIMATE GLACIAL CYCLE:A HIGH-RESOLUTION POLLEN RECORD FROM ODP SITE 1144,THE SOUTH CHINA SEA
Author(s): LUO Yunli, SUN Xiangjun
Pages: 19-
26
Year: 2003
Issue:
1
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY
Keyword: 孢粉; 倒数第二次冰期旋回; 大洋钻探(ODP); 南海;
Abstract: 为了研究倒数第二次冰期旋回(氧同位素6/5期)中的环境变迁,对南海北部大洋钻探(ODP)1144站(20°3.18′N、 17°25.14′E, 水深2 037 m)总共385个孢粉样品进行了分析研究,时间分辨率为530 a/样.孢粉谱的主要特征是松属花粉和草本植物花粉百分含量交替占优势,并且大致和冰期旋回对应:间冰期时松属花粉占优势,冰期时草本植物花粉占优势.详细的对比表明,在氧同位素6/5期的冰期-间冰期过渡阶段,孢粉组合的变化要早于氧同位素记录指示的冰盖体积的变化,表明中低纬度地区气候变暖早于冰盖后退.还讨论了孢粉组合变化对轨道和亚轨道旋回以及季风变化的响应.
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