中文摘要：

对北冰洋海域11个站位的沉积物进行了四醚脂类（GDGTs）生物标志化合物的浓度及分布特征分析,结合沉积物的TOC及TN含量及同位素组成对GDGTs的来源进行了探讨。对比TEX86-SST与WOA数据库资料,研究区内美亚海盆73°N以南站位以及欧亚海盆ARC5-BB06站的TEX86-SST与SST具有很好的符合性。楚科奇海域68~73°N站位样品和全球海洋TEX86-SST模式一致,与年平均SST具有较好的符合性。白令海区及ARC5-BB06站TEX86-SST与夏季平均SST符合性更好,可能与提供GDGT的古菌夏季的生产力更高,在全年生产力中所占比例大有关。

英文摘要：

Isoprenoid and branched glycerol dialkyl glycerol tetraethers（GDGTs）,TOC,TN,δ13 C andδ15 N were analyzed for the surface sediments of the Arctic Ocean and the Bering Sea in order to understand their source and test the TEX86 index.Compared with the WOA database,the TEX86-and TEXL86-derived temperatures are consistent with the sea surface temperatures in the study area,except for the Station of ARC5-SR11 near the 73°N.The TEXL86-SST are consistent with the annual mean SST from the samples located in the Chukchi Sea.The TEXL86-SST are consistent with the summer mean SST from the samples located in the Bering Sea,maybe resulted by the higher production of marine Archaea（Thaumarchaeota）in the summer.