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PALYNOLOGICAL RECORD AND ITS PALEOCLIMATE IMPLICATION IN THE NORTHERN OKINAWA TROUGH SINCE 7500a BP
Author(s): 
Pages: 475-480
Year: Issue:  5
Journal: OCEANOLOGIA ET LIMNOLOGIA SINICA

Keyword:  冲绳海槽全新世孢粉δ18O曲线;
Abstract: 通过分析冲绳海槽北部DOC024柱状样的孢粉记录,重建了该地区7500a BP以来的植被和气候变化历史.该孔自下而上分为4个孢粉组合带:P1带(7500-6600a BP)气候较寒冷湿润;P2(a)带(6600-4900a BP)亚热带植物花粉含量升高,气候变温暖,P2(b)带(4900-3100a BP)温度变化不明显,湿度降低;P3带(3100-1500a BP)温带植物花粉含量升高,热带-亚热带植物花粉含量降低,气温下降;P4带(1500-200a BP)随着蕨类植物的大量繁盛,气温又回升,但从300a BP起,气候又出现下降趋势.文中还对浮游有孔虫δ18O曲线进行了分析,发现它的变化趋势与孢粉组合之间存在着对应性.
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