印度尼西亚多岛海末次冰期最盛期以来的穿越流活动  

Indonesian Throughflow Actions during Last Glacial Maximum

作　　者：丁旋[1] 方念乔[1] F.Guichard F.Bassinot L.Labeyrie 

机构地区：[1]中国地质大学海洋地学中心,北京100083 [2]Laboratoire des Sciences du Climat et de l'Environnement

出　　处：《地球科学（中国地质大学学报）》2004年第2期151-156,共6页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目 (No .40 2 72 0 74)

摘　　要：印度尼西亚穿越流是西太平洋和印度洋之间热量传输的重要载体 ,穿越流的活动由潜在地影响ElNino和季风现象进而影响到全球气候变化 .通过对爪哇海SHI90 0 6岩心LGM以来氧同位素、有孔虫与CaCO3 沉积量、浮游有孔虫浅层水种与深层水种比值反映的古温跃层变化等的研究 ,得出结论 :研究区末次冰期氧同位素 2期穿越流活动微弱 ,冰后期穿越流活动增强 ;特别是冰消期终止期ⅠA,穿越流活动由弱迅速增强 ,是冰川消融、海平面上升 ,印度尼西亚岛弧古海水通道开放的结果 .Indonesian throughflow is the important carrier of the heat transport between the western Pacific Ocean and the Indian Ocean. Throughflow actions affect the global climate changes by influencing potentially El Nino events and monsoon actions. Based on the studies of the oxygen isotope, the mass accumulation rates of foraminifera and CaCO_3, the thermocline estimated by the ratio of the planktonic foraminifera shallow-dwelling species and deep-dwelling species, we know that the throughflow was weak during the last glacial oxygen isotope stage 2, and enhanced during the interglacial oxygen (isotope) stage 1. Especially in the deglaciation termination Ⅰ_A, the throughflow changed rapidly from weak to strong. This is due to the ice sheet melting, sea level rising, and the Indonesian Archipelago water pathways opening.

关 键 词：印度尼西亚多岛海 穿越流 末次冰期最盛期 有孔虫 古温跃层 古生产力 

分 类 号：P736[天文地球—海洋地质]