Assemblage of benthic foraminifera in sediment core GIK23414-8

Marine isotope stage (MIS) 9 is one of the least investigated Pleistocene interglaciations. The present study describes reconstructions of deepwater conditions during this time interval based on benthic foraminiferal assemblages from sediment core M23414 (Rockall Plateau, North Atlantic). The results of faunal analysis were supported by planktic d18O, sea surface temperature reconstructions based on planktic foraminiferal assemblages and content of ice rafted debris. Statistical data processing using principal component analysis revealed five climaterelated benthic foraminiferal associations that changed in response to alterations of deepwater circulation.

海洋同位素阶段（Marine isotope stage, MIS）9是研究程度最低的更新世间冰期之一。本研究基于北大西洋罗卡尔海台沉积物岩芯M23414中的底栖有孔虫组合，重建了该时段的深水环境状况。本研究的动物群分析结果得到了浮游有孔虫氧同位素δ¹⁸O、基于浮游有孔虫组合的海表温度重建结果以及冰筏碎屑含量的支撑。通过主成分分析（principal component analysis）开展的统计数据处理，识别出5种与气候相关的底栖有孔虫组合，这些组合随深水环流的变化发生相应调整。