Foraminiferal responses to major Pleistocene paleoceanographic changes in the southern South China Sea
Foraminiferal responses to major Pleistocene paleoceanographic changes in the southern South China Sea
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DOI：
10.1029/1999pa000431
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发表时间：
2000-04
期刊：
影响因子：
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通讯作者：
Z. Jian;Pinxian Wang;Min-Pen Chen;Baohua Li;Quanhong Zhao;C. Bühring;C. Laj;Hui‐Ling Lin;U. Pfla
中科院分区：
文献类型：
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作者：
Z. Jian;Pinxian Wang;Min-Pen Chen;Baohua Li;Quanhong Zhao;C. Bühring;C. Laj;Hui‐Ling Lin;U. Pfla
基于三角洲（18）O、粗粒地层、磁地层学和生物地层学等资料，建立了南海南部17957-2岩芯近1500 kyr的详细年龄模型。三角洲（18）O记录与海洋同位素阶段（MIS） 22的中更新世旋回（MPR）之后的100 kyr旋回明显相似。浮游有孔虫对MPR反应迅速，表现出MPR后海温和溶解度的升高。底栖有孔虫直到Brunhes/Matuyama边界才对它做出反应。自MPR以来，温跃层深度逐渐变浅，直到MISs 6-5。MISs 6-5的这一重大变化也反映在SSTs的减少和生产力和深水质量的增加上。因此，发现了两个主要的更新世古海洋学变化：一个是围绕MPR；另一次发生在mss6 -5内，推测这可能是由构造力引起的表层和深层环流的重组所致。
A detailed age model for core 17957-2 of the southern South China Sea was developed based on delta(18)O, coarse fraction, magnetostratigraphy, and biostratigraphy for the last 1500 kyr. The delta(18)O record has clear similar to 100-kyr cycles after the Mid-Pleistocene Revolution (MPR) at the entrance of marine isotopic stage (MIS) 22. Planktonic foraminifera responded to the MPR immediately, showing the increased sea surface temperature (SST) and dissolution after the MPR. Benthic foraminifera did not respond to it until the Brunhes/Matuyama boundary. Since the MPR, the depth of thermocline gradually became shallower until MISs 6-5. This major change within MISs 6-5 was also reflected in the decreased SSTs and increased productivity and Deep Water Mass. Thus two major Pleistocene paleoceanographic changes were found: One was around the MPR; the other occurred within MISs 6-5, which speculatively might be ascribed to the reorganization of surface and deep circulation, possibly induced by tectonic forces.