Timing, pace and controls on ice sheet retreat: an introduction to the BRITICE-CHRONO transect reconstructions of the British-Irish Ice Sheet
Timing, pace and controls on ice sheet retreat: an introduction to the BRITICE-CHRONO transect reconstructions of the British-Irish Ice Sheet
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冰盖退缩的时间、速度和控制：英国-爱尔兰冰盖 BRITICE-CHRONO 断面重建介绍
DOI：
10.1002/jqs.3326
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发表时间：
2021
影响因子：
2.3
通讯作者：
Clark C
中科院分区：
文献类型：
--
作者：
Clark C
为了帮助提高海平面上升预测的稳健性，BRITICE-CHERNO项目将前不列颠-爱尔兰冰盖的知识从31 ka提高到15 ka，以便将其用作数据丰富的环境，以改进冰盖建模。该项目由40多名古冰川学家组成，涵盖陆地和海洋地质学和地貌学、测年和冰盖和海洋模型方面的专门知识。一项系统和定向的活动，从大陆架边缘到短距离(10公里)的岸上，组织了八个断面，收集了914个样本，产生了639个新的年龄，使制约冰盖崩塌时间和变化速度的过时地点的数量增加了两倍。本期特刊综合了八个断面的冰最大限度地前进和随后的退缩的这些发现，以产生横跨海洋到陆地过渡的冰缘位置的最终古地理重建。这些结果被用来理解驱动或调节冰盖退缩的控制因素。另一篇论文报道了冰盖模拟实验和经验数据如何结合使用，另一篇论文探讨了冰筏碎片的冰川学意义。
Motivated to help improve the robustness of predictions of sea level rise, the BRITICE‐CHRONO project advanced knowledge of the former British–Irish Ice Sheet, from 31 to 15 ka, so that it can be used as a data‐rich environment to improve ice sheet modelling. The project comprised over 40 palaeoglaciologists, covering expertise in terrestrial and marine geology and geomorphology, geochronometric dating and the modelling of ice sheets and oceans. A systematic and directed campaign, organised across eight transects from the continental shelf edge to a short distance (10s of kilometres) onshore, was used to collect 914 samples which yielded 639 new ages, tripling the number of dated sites constraining the timing and rates of change of the collapsing ice sheet. This special issue synthesises these findings of ice advancing to the maximum extent and its subsequent retreat for each of the eight transects to produce definitive palaeogeographic reconstructions of ice margin positions across the marine to terrestrial transition. These results are used to understand the controls that drove or modulated ice sheet retreat. A further paper reports on how ice sheet modelling experiments and empirical data can be used in combination, and another probes the glaciological meaning of ice‐rafted debris.