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Multiproxy quantification of NE Irish Ice Sheet deglaciation timing and dynamics

爱尔兰东北部冰盖消冰时间和动态的多代理量化

基本信息

批准号：
2548383
负责人：
金额：
--
依托单位：
Royal Holloway University of London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2548383
关键词：
Multiproxy quantification NE Irish Ice

项目摘要

The last British-Irish Ice Sheet (BIIS) is an excellent analogue for the vast ice masses currently occupying Antarctica and Greenland. Reconstructions of the BIIS therefore have the potential to inform us of future trajectories of large-scale ice mass loss. However, large gaps in our knowledge of major ice (re)advance and retreat in a rapidly shifting climate still hinder the efficacy of the BIIS as a comprehensive predictor of future deglaciation elsewhere in the world. To fill these gaps, the ambition of this project is to understand the role of climatic, sea-level, and internal drivers related to ice sheet stability and ice divide migration in the north-western sector of the BIIS. We will develop a brand new geomorphological understanding of little understood (re)advances of ice in Northern Ireland by employing unparalleled 0.4 m resolution digital elevation models. This will contextualise a new chronology for this area using radiocarbon and cosmogenic nuclide dating campaigns, and the first tephrostratigraphic framework for the Late Glacial in Ireland. This high-resolution multiproxy approach will allow us to date and directly compare rates of deglaciation across Ireland and Britain, providing new insights into the timing and drivers of ice-mass recession critical for improving BIIS models.

最后的英国-爱尔兰冰盖（BIIS）是目前占据南极洲和格陵兰岛的巨大冰块的极好模拟。因此，BIIS的重建有可能告诉我们未来大规模冰质量损失的轨迹。然而，我们在快速变化的气候中对主要冰（再）前进和后退的认识存在很大差距，这仍然阻碍了BIIS作为世界其他地方未来冰川消融综合预测因子的有效性。为了填补这些空白，该项目的目标是了解气候，海平面和内部驱动因素在BIIS西北部的冰盖稳定性和冰分水岭迁移中的作用。我们将通过采用无与伦比的0.4米分辨率的数字高程模型，对北方爱尔兰冰的进展进行全新的地貌学理解。这将使用放射性碳和宇宙成因核素测年活动为该地区提供一个新的年表，并为爱尔兰晚冰期提供第一个火山灰地层框架。这种高分辨率的多代理方法将使我们能够确定日期并直接比较爱尔兰和英国的冰川消退率，为改进BIIS模型关键的冰量衰退的时间和驱动因素提供新的见解。