中文摘要：

对南海南部陆坡86GC柱状样的有孔虫进行了统计与分析,并采用古生态转换函数FP-12E估算了古海水表层温度。分析结果表明,该柱状样所处区域自MIS3晚期以来一直处于溶跃面之上,碳酸盐溶解作用很弱,仅在大约8 000 a BP以来具有部分溶解作用;不同生态特征浮游有孔虫丰度的变化,指示约30 ka BP以来,南海南部表层海水温度（SST）逐步增高,盐度呈降低趋势,反映了末次冰期以来气候变暖、海平面上升、钻孔所在区域水深加大、碳酸盐溶解作用增强、海水盐度降低的过程。转换函数计算得到冬季SST为（22.8～27.4）℃,夏季为（28.1～29.5）℃,季节温差为（2.1～5.3）℃,与前人在附近区域的计算结果基本一致。末次冰期晚期与冰后期的夏季SST值差别不大,最大变幅仅1.4℃;冬季SST变化则较大,最大变幅达4.6℃。由于转换函数法本身存在误差等原因可能导致上述数值并不确切,但其反映的温度变化总趋势应该是可信的。

英文摘要：

A total of 56 samples of the sediment core 86GC（113°02.5860′E,10°18.1740′N,water depth 2651m,core length 1.68m）,taken from the southern South China Sea（SCS）,were analyzed for foraminifera changes,and the sea surface temperature（SST） was estimated by using transfer function FP-12E based on the foraminifera abundance data of different species,in order to reconstruct the sea surface characteristic change.It has been revealed that the studied area had been above the lysocline since late MIS 3 and the carbonate dissolution was very weak which appeared partially only after ca.8 000 a B.P.The results also indicate decreasing salinity and increasing SST since the late Last Glacial.The SST evaluated by transfer function was 28.1～29.5 ℃ in summer and 22.8～27.4 ℃ in winter,with seasonal difference of 2.1～5.3 ℃.This result is basically consistent with previous evaluation to the area nearby.The summer SST during the MIS 2 was not much different from that during the Holocene,with a change less than 1.4 ℃,while the winter SST was more different with the largest change of 4.6 ℃.The above data may have some tolerance from transfer function,but the temperature change trend during the glacial-interglacial circles should be believable.