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科学通报  2011 

末次盛冰期以来菲律宾南部气候变化的孢粉记录

, PP. 1554-1561

Keywords: 末次冰盛期,热带植被,孢粉分析,海平面变化,河流径流量

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Abstract:

通过对位于西太平洋暖池区的菲律宾南部深海钻孔MD06-3075上半部分的孢粉分析,结合氧同位素记录,得知冰盛期时由于温度的下降,该区热带高山雨林向低海拔地区下移,在深海沉积中记录到了这一类型花粉的增加;而到全新世时植被类型以热带低地雨林为主,并且红树林广泛发育.红树林和高山雨林的变化,分别指示了海平面的上升和温度的增加,而其他的草本、蕨类等变化则显示冰盛期时湿度比现在要略干.在全新世中后期红树林明显退缩表明全新世时期气候发生变化,主要表现为影响红树林发育的河流径流量有所下降,同时喜湿且主要依靠河流搬运的蕨类孢子减少,也说明河流径流量下降.这些变化可能是受东亚季风强弱变化控制的结果,也可能和ENSO的变化有关联.

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