【摘要】 楚科奇海 C-8短柱沉积样中检出甾醇化合物碳数 C₂₇、C₂₈、C₂₉和C₃₀双键位置在5-和5,22-及22,24-的甾醇;白令海 B2-9短柱沉积样中检出甾醇化合物碳数 C27、C28和 C29双键位置在5-和5,22-及22-的甾醇。从两个海域的甾醇组合特征来看,主要来自陆源碎屑物质以及海洋硅质生物自生源组成。研究还表明楚科奇海和白令海沉积地层（2—0cm）中甾醇异常记录对应时间段约20世纪80年代—90年代未,保存着北极增暖的信号,这是北极海域生态环境对周边气候变化作出的响应。更多还原

【Abstract】 The compounds of sterols such as C₂₇,C₂₈,C₂₉ and C₃₀ are recorded from C-8 core of the Chukchi Sea:The double key position is located at 5;5,22 as well as 22,24.The compound of sterols such as C₂₇,C₂₈,C₂₉ are recorded from B2-9 core of the Bering Sea.The double- bond is located at 5;5,22 as well as 22,24.The composition of characteristics of sterols indi- cate that the substance is mainly contributed by the terrigenous origin and marine silicate organ- isms.The results are also suggest that the record of abnormal sterols from the surface sediments （2—0 cm）in the Chukchi Sea and the Bering Sea represent the period from 1980s to the late 1990s.The strong signal of the Arctic warming is preserved in the sediments.This indicates the eco-environmental change responding to climate effect of circumjacent.更多还原