Maximum extent and readvance dynamics of the Irish Sea Ice Stream and Irish Sea Glacier since the Last Glacial Maximum
Maximum extent and readvance dynamics of the Irish Sea Ice Stream and Irish Sea Glacier since the Last Glacial Maximum
复制标题
DOI：
10.1002/jqs.3313
复制
发表时间：
2021-05
影响因子：
2.3
通讯作者：
J. Scourse;R. Chiverrell;R. Smedley;D. Small;M. Burke;M. Saher;K. V. Landeghem;G. Duller;C. Ó. Cofaigh;M. Bateman;S. Benetti;S. Bradley;L. Callard;D. Evans;D. Fabel;Geraint T. H. Jenkins;S. Mccarron;A. Medialdea;S. Moreton;Xianjiao Ou;D. Praeg;D. Roberts;H. Roberts;C. Clark
中科院分区：
文献类型：
--
作者：
J. Scourse;R. Chiverrell;R. Smedley;D. Small;M. Burke;M. Saher;K. V. Landeghem;G. Duller;C. Ó. Cofaigh;M. Bateman;S. Benetti;S. Bradley;L. Callard;D. Evans;D. Fabel;Geraint T. H. Jenkins;S. Mccarron;A. Medialdea;S. Moreton;Xianjiao Ou;D. Praeg;D. Roberts;H. Roberts;C. Clark
BRITICE-CHRONO项目已经产生了一套最近发表的放射性碳年龄，来自凯尔特海和爱尔兰海近海的冰消序列，以及陆地宇宙成因核素和邻近陆上站点的光释光年龄。所有已发表的数据都集成在这里与新的地质年代学数据从威尔士在修订后的贝叶斯分析，使整个盆地的冰退缩动态重建。冰川消退速度的模式和变化更多地受到地形限制和内部冰动力学的影响，而不是外部控制。数据表明，一个主要的，但快速的和非常短暂的广泛的薄冰推进爱尔兰海冰流（ISIS）超过300公里以南的圣乔治海峡的海产犊边缘在陆架断裂在25.5 ka;这可能是由大量的冰堆积堵塞收缩的圣乔治海峡之前。25和26 ka之间的释放事件被解释为刺激了快速冰流和转移到西部的冰在北方爱尔兰海到海洋ISIS的主轴远离陆地冰终止在英格兰中部地区，一个过程启动冰停滞和形成广泛的死冰景观在中部地区。
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.