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爪哇海末次冰盛期以来的季风与穿越流活动记录

, PP. 465-471

Keywords: 爪哇海,末次冰盛期,浮游有孔虫,古季风,穿越流

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Abstract:

文章通过SHI9034岩芯氧同位素曲线、AMS14C测年、浮游有孔虫组合及其所反映的温盐变化特点,并与爪哇海北部的SHI9006岩芯对比研究,获得如下认识:末次冰期21~15kaB.P.阶段,爪哇海区东南季风强而西北季风微弱,气候冷干,混合层薄,生物生产力高;15~10kaB.P.和10~7kaB.P.阶段由于海平面迅速上升,望加锡海峡和龙目海峡通道变宽,出现较强的表层穿越流活动;早全新世东南与西北季风都有增强,说明当时研究区气候有着更强的季节性;7~3kaB.P.阶段,爪哇海北部的穿越流主要在温跃层水中传输,到达爪哇上升流区时,上升至表层,使得混合层增厚,同时也抑制了上升流活动;约3kaB.P.以来,研究区穿越流活动表现与现代相近的性质,主要在温跃层水中传输。

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