Fossil ostracode assemblages were investigated in three sediment cores from the Chukchi Plateau, in the western Arctic Ocean, in order to reconstruct its late Quaternary paleoceanographic history. The cores were retrieved from water depths of 435–741 m, within the range of modern Atlantic Water (AW). The ostracode abundance shows distinct glacial/interglacial fluctuations, suggesting the suppression of benthic bioproductivity during glacial periods, probably associated with the development of perennial sea ice. Based on the modern ostracode distribution in the Arctic Ocean, 11 common ostracode taxa out of a total of 33 are related to specific water mass or sea ice conditions. Analyses of key ostracode species and a benthic foraminifera species, Cassidulina teretis, reveal a pronounced faunal turnover between MIS 3 and MIS 1. A distinct assemblage dominated by Polycope spp. And accompanied by otherspecies preferring Arctic Intermediate Water (AIW) (Microcythere medistriatum, Pseudocythere caudata, Cytheropteron sedovi, C. scoresbyi, and Pedicythere spp.) characterizes the period between late MIS 5 and MIS 3, whereas MIS 1 is characterized by a rise in Krithe spp. and two species associated with AW (Cytheropteron perlaria and Cassidulina teretis). The faunal turnover indicates an upward shift of AIW and adecline of the influence of warm AW during the period between late MIS 5 and MIS 3, presumably caused by a weakening or cessation of the westward dispersion of AW. The distributions of two sea-ice related species, Acetabulastoma arcticum and Rabilimis mirabilis, indicate minimal perennial sea-ice cover and probably summer sea-ice-free conditions throughout MIS 1 and the development of a summer sea-ice margin environment during interglacial/interstadial periods.

在北冰洋西部楚科奇高原的三个沉积岩心中研究了化石Ostracode组合，以重建其晚第四纪古海洋学历史。取自现代大西洋水域（AW）范围内435–741 m的水深的岩心。ostracode的丰度显示出明显的冰川/冰川间波动，表明在冰川时期底栖生物生产力受到抑制，这可能与多年生海冰的发展有关。根据北冰洋的现代ostracode分布，总共33种中的11种常见ostracode分类群与特定水质或海冰条件有关。主要ostracode物种和底栖有孔虫物种Cassidulina teretis的分析，显示出MIS 3和MIS 1之间明显的动物区系转换。以Polycope spp为主的独特组合。并伴有otherspecies宁愿北极中层水（AIW）（Microcythere medistriatum，Pseudocythere矾，Cytheropteron sedovi，C. scoresbyi，和Pedicythere spp。）的表征MIS 5和MIS 3后期之间的时间段，而MIS 1的特征在于在一个上升克里特（Krithe spp。）和与AW有关的两个物种（Cytheropteron perlaria和Cassidulina teretis）。动物区系更新表明，在MIS 5到MIS 3后期之间，AIW向上移动，暖AW的影响下降，这可能是由于AW向西扩散的减弱或停止所致。两个与海冰有关的物种Arcetabulastoma arcticum和Rabilimis mirabilis的分布表明，整个MIS 1的多年生海冰覆盖量极小，并且可能在夏季无海冰条件下发生，并且在冰间/间质过渡期形成了夏季海冰边缘环境时期。