南海南部表层海水古温度估算与次表层海水特征变化  

SEA SURFACE TEMPERATURE ESTIMATE AND SUBSURFACE WATER EVOLUTION IN THE SOUTHERN SOUTH CHINA SEA

作　　者：李保华[1] 翦知湣[2] 黄宝琦[2] Sarnthein M 汪品先[2] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]同济大学海洋地质开放实验室,上海200092 [3]基尔大学地球科学研究所,德国d24098

出　　处：《微体古生物学报》2004年第1期37-43,共7页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金 ( 4 99995 60和 40 2 760 12 );国家重点基础研究发展规划项目 ( G2 0 0 0 0 785 0 0 );江苏省"3 3 3人才工程"项目;中国科学院知识创新工程资助

摘　　要：南海南部～ 2 Ma BP以来的表层海水古温度估算表明 ,表层海水温度变化在更新世冰期旋回中波动比南海北部为小、保持比较温暖 ,但在长时间尺度上转换函数古水温仍然存在一定的变化趋势。转换函数古温度计算的低温时期并不与冰期相对应 ,表明南海南部具有独特的表层海洋演化特征 ,可能与次表层水体性质、上部水体结构等密切相关。过去 2 Ma BP以来的浮游有孔虫组合演化表明 ,南海南部海水温跃层呈现由氧同位素 MIS79期向～ 5 3期相对变浅 ,自 MIS5 3期向布容 /松山 (B/ M)古地磁界线附近变深 ,然后 ,自布容 /松山界线以来又相对变浅的演化过程。Sea surface temperature (SST) estimates of the southern South China Sea over the last 2 Ma indicate that, the water temperature kept warm with lower variation compared with the northern South China Sea during the Pleistocene glacial-interglacial cycles. However, for the long-time scale, the transfer-function estimated SST still has an evident trend. The low-temperature periods were not consistent with the glacial times, which implies that there exists characteristic evolution for the sea surface water in the southern South China Sea. The transfer-function estimated SST might reflect the subsurface water and upper water-column structure of the low-latitude marine environment. Evolution of planktonic foraminiferal fauna over the last 2 Ma indicated that the thermocline of the southern South China Sea shoaled gradually from marine isotope stage (MIS) 79 to ~53, deepened from MIS 53 to the Brunhes/Matuyama boundary, and shoaled again after B/M boundary.

关 键 词：南海 表层海水古温度 海洋环境 更新世 南沙海区 

分 类 号：P731.1[天文地球—海洋科学]