| 南海南部NS93-5柱样揭示的晚第四纪以来的古海洋学特征 |
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| 引用本文： | 涂霞,郑范,陈木宏.南海南部NS93-5柱样揭示的晚第四纪以来的古海洋学特征[J].热带海洋学报,2000,19(4):36-43. |
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| 作者姓名： | 涂霞 郑范 陈木宏 |
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| 作者单位： | 中国科学院南海海洋研究所,广东,广州,510301 |
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| 基金项目： | 国家专项“南沙群岛及其邻近海区综合科学考察”资助项目 (97-92 6-0 3 -0 3 )，中国科学院资源与生
态环境研究重大、重点资助项目 (KZ95 2 -5 1 -41 7)，同济大学海洋地质开放实验室资助项目 |
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| 摘 要： | 由南海南部海区NS93 - 5柱样的浮游有孔虫氧同位素地层学和浮游有孔虫分析结果获得的古环境参数 ,揭示了距今 1 90ka以来南部海区受西太平洋热带水的影响 ,以及南沙海区表层水和苏禄海变性水的变化历史 ;在末次盛冰期碳酸盐含量较低 ,但是碳酸盐含量的最低值出现在氧同位素 4期 ;表层水体的含氧量呈现为间冰期大于冰期 ,而古生产力的变化则为冰期大于间冰期 ;依据氧同位素和浮游有孔虫特征分析结果 ,建立了南部海区距今 1 90ka以来的古气候演变序列。
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| 关 键 词： | 南海南部海区 浮游有孔虫 古海洋环境 古气候演变 |
| 修稿时间： | 2000-01-20 |
PALEOCEANOGRAPHIC CHARACTERS IMPLIED BY CORE NS93-5 IN SOUTHERN SOUTH CHINA SEA SINCE LATE QUATERNARY |
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| TU Xia,ZHENG Fan,CHEN Mu-hong.PALEOCEANOGRAPHIC CHARACTERS IMPLIED BY CORE NS93-5 IN SOUTHERN SOUTH CHINA SEA SINCE LATE QUATERNARY[J].Journal of Tropical Oceanography,2000,19(4):36-43. |
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| Authors: | TU Xia ZHENG Fan CHEN Mu-hong |
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| Abstract: | Oxygen isotope and assemblages of planktonic foraminifera in core NS93-5 from southern slope of the South China Sea are analyzed to evaluate changes in parameters of paleo environment. The result reveals the influence of the surface water mass from tropical western Pacific Ocean on the southern part of the South China Sea and the variation histories of surface water mass of Nansha Islands sea area and variety water of Sulu Sea over the past 190ka. During the last glacial maximum, the CaCO 3 content was lower, but the lowest value occurred at the fourth stage of oxygen isotope. In this sea area, the oxygen content of surface water in interglacial period was generally greater than that in glacial period, while the paleo productivity in the glacial period was higher than in the interglacial period. Based on the analysis on oxygen isotope and planktonic foraminifera characters, a paleoclimatic evolution sequence of southern South China Sea since 190ka B.P. is established. |
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| Keywords: | southern South China Sea planktonic foraminifera paleo marine environment paleoclimatic evolution |
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