The BRITICE-CHRONO Project has generated a suite of recently published radiocarbon ages from deglacial sequences offshore in the Celtic and Irish seas and terrestrial cosmogenic nuclide and optically stimulated luminescence ages from adjacent onshore sites. All published data are integrated here with new geochronological data from Wales in a revised Bayesian analysis that enables reconstruction of ice retreat dynamics across the basin. Patterns and changes in the pace of deglaciation are conditioned more by topographic constraints and internal ice dynamics than by external controls. The data indicate a major but rapid and very short-lived extensive thin ice advance of the Irish Sea Ice Stream (ISIS) more than 300 km south of St George's Channel to a marine calving margin at the shelf break at 25.5 ka; this may have been preceded by extensive ice accumulation plugging the constriction of St George's Channel. The release event between 25 and 26 ka is interpreted to have stimulated fast ice streaming and diverted ice to the west in the northern Irish Sea into the main axis of the marine ISIS away from terrestrial ice terminating in the English Midlands, a process initiating ice stagnation and the formation of an extensive dead ice landscape in the Midlands.

中文翻译：

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自末次盛冰期以来爱尔兰海冰流和爱尔兰海冰川的最大范围和重新动态

BRITICE-CHRONO 项目从凯尔特海和爱尔兰海近海的冰消期序列以及陆地宇宙成因核素和相邻陆上地点的光激发发光年龄中生成了一系列最近公布的放射性碳年龄。所有已发布的数据都在此处与来自威尔士的新地质年代学数据进行了整合，以进行修订的贝叶斯分析，从而能够重建整个盆地的冰退动力学。冰川消融速度的模式和变化更多地受地形限制和内部冰动态的影响，而不是外部控制。数据表明，在圣乔治海峡以南 300 多公里处，爱尔兰海冰流 (ISIS) 发生了一次重大但迅速且持续时间很短的广泛薄冰推进，到达 25.5 ka 的陆架断裂处的海洋产犊边缘；这可能是因为大量的冰堆积堵塞了圣乔治海峡的狭窄部分。25 至 26 ka 之间的释放事件被解释为刺激了快速的冰流，并将爱尔兰北部的冰转移到西部，进入海洋 ISIS 的主轴，远离终止于英国中部的陆地冰，这一过程引发了冰停滞以及在中部地区形成了广泛的死冰景观。