RV Investigator IN2017_V01 two piston core records from the East Antarctic Sabrina Coast region

This record describes the deep-sea sediment core products produced by Holder et al. (2020) from two sites in the Sabrina Coast continental slope and rise, the first sedimentary sequences investigated in this region of the East Antarctic.The cores were used to study changes in the oceanic and depositional environment and their interaction with the nearby Totten Glacier. The two archives show clear variations between glacial and interglacial phases over the last 350 Kyrs, driven by the movement of the ice sheet advancing and retreating over the continental shelf and ocean circulation patterns that deliver heat either close to the Antarctic coastline or further away from the continental slope. This research provided a foundation for future palaeoceanographic work in the region and suggested that warm oceanic conditions, similar to today, have influenced the Sabrina Coast during past warm interglacials over the last 350 Kyrs.For more details please refer to the cited article (download link provided below):Holder, L., M. Duffy, B. Opdyke, A. Leventer, A. Post, P. O’Brien and L. K. Armand (2020): Controls on Sedimentation and Primary Productivity in Late Pleistocene Slope Sediments Seaward of the Totten Glacier, East Antarctica. Paleoceanography, under review.

本数据集记录了Holder等人（2020年）从南极东部萨布丽娜海岸大陆坡与陆隆的两个站位采集的深海沉积物岩芯，该两处岩芯的沉积序列是南极东部该区域首个被系统研究的沉积序列。本次采集的岩芯被用于探究该区域海洋与沉积环境的演化过程，及其与邻近托滕冰川的相互作用。这两份沉积记录清晰展现了过去35万年间冰期与间冰期的显著差异，其驱动机制包括冰盖在大陆架上的进退运动，以及将热量输送至南极海岸线附近或远离大陆坡的海洋环流模式。本研究为该区域后续的古海洋学研究奠定了重要基础，并指出在过去35万年的历次暖间期，与现代相似的暖海况曾对萨布丽娜海岸产生影响。如需获取更多细节，请参阅以下引用文献（下载链接见下方）：Holder, L., M. Duffy, B. Opdyke, A. Leventer, A. Post, P. O’Brien 与 L. K. Armand (2020): 《南极东部托滕冰川外侧晚更新世坡地沉积物的沉积作用与初级生产力控制机制》，《古海洋学》（Paleoceanography），正在审稿中。