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中文摘要：
采自南海南部的YSJD-86GC柱样（113°02．5860′E，10°18．1740′N，水深2651m，柱长1．68m）提供了该区近27ka以来的古海洋学记录。沉积物岩性特征、浮游有孔虫分布特征、全岩样品AMS^14C测年、氧稳定同位素等分析结果表明，南海南部末次冰期以来一直处于稳定的陆坡一半深海沉积环境；氧同位素Ⅱ期以来表层海水古温度逐渐增高；温跃层在氧同位素Ⅱ期相对较浅，之后逐渐变深，全新世中期以来又再次变浅。11—9．5kaBP期间有一次古气候回返事件，与“新仙女木”事件相对应；6—5kaBP期间古气候波动较大，是全新世中期气候波动剧烈阶段的记录。
英文摘要：
The core YSJD-86GC, located in the southern South China Sea （113°02.5860′E,10°18.1740′N）, with water depth of 2651m and core length of 1.68m, discloses a paleoceanographic record of the southern South China Sea since about 27 ka BP. The lithology, planktonic foraminifera, AMS14C age and oxygen isotope indicate that this area has been being in a stable slope-bathyal environment and the sea surface temperature has successively in- creased since the last Glacial. The thermocline was comparatively shallow at the stage of oxygen isotope circle Ⅱ, and then gradually deepened. It got shallow again in the middle Holocene. A paleo-climate cold return event took place during 11-9.5 ka BP, which was corresponding to the Younger Dryas Era. Intense changes of paleo-climate occurred during 6--5 ka BP, reflecting the climatic instability of the middle-Holocene.
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