(Table 2) Age determination of sediment cores MD95-2002 and MD03-2692

We have compiled results obtained from four high sedimentation rate hemipelagic sequences from the Celtic sector of the NW European margin (NE Atlantic) to investigate the paleoceanographic and paleoclimatic evolution of the area over the last few climatic cycles. We focus on periods characteristic of deglacial transitions. We adopt a multiproxy sedimentological, geochemical, and micropaleontological approach, applying a sampling resolution down to ten microns for specific intervals. The investigation demonstrates the relationships between the Bay of Biscay hydrography and the glacial/deglacial history of both the proximal British-Irish Ice Sheet (BIIS) and the western European continent. We identify recurrent phases of laminae deposition concurrent with major BIIS deglacial episodes in all the studied cores. Evidence for abrupt freshwater discharges into the open ocean highlights the influence of such events at a regional scale. We discuss their impact at a global scale considering the present and past key location of the Bay of Biscay versus the Atlantic Meridional Overturning Circulation (AMOC).

本研究收集了来自西北欧陆缘（东北大西洋）凯尔特海域4套高沉积速率半远洋沉积序列的分析结果，旨在探究该区域近数个气候旋回以来的古海洋学与古气候演化历程。研究重点聚焦于冰消期转型阶段的典型时期。本研究采用多指标沉积学、地球化学与微古生物学分析方法，并针对特定层段采用低至10微米的采样分辨率。本研究揭示了比斯开湾水文状况与邻近的不列颠-爱尔兰冰盖（British-Irish Ice Sheet, BIIS）及西欧大陆的冰期/冰消期演化历史之间的关联。本研究在所有研究岩心中均发现，纹层沉积的周期性发育阶段与不列颠-爱尔兰冰盖的重大冰消事件同步发生。有关突发性淡水向远洋排放的证据，凸显了此类事件在区域尺度上的影响。结合比斯开湾当前与历史上相对于大西洋经向翻转环流（Atlantic Meridional Overturning Circulation, AMOC）的关键区位，本研究进一步探讨了此类事件在全球尺度上的影响。