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Investigating the potential for catastrophic collapse of Greenland's 'land'-terminating glacier margins

调查格陵兰岛“陆地”终止冰川边缘发生灾难性崩塌的可能性

基本信息

批准号：
2593173
负责人：
金额：
--
依托单位：
University of Edinburgh
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-2593173
关键词：
Investigating potential catastrophic collapse Greenland

项目摘要

This project will investigate the influence of proglacial lake formation on the long-term dynamic stability of outlet glaciers draining the Greenland Ice Sheet.This project will use a range of earth observation data to investigate the influence of proglacial lake formation on the long-term dynamic stability of outlet glaciers draining the GrIS. More specifically, the project will quantify how ice-motion around the GrIS has responded spatially and temporally to glacier termination in proglacial lakes, determine the extent to which new ice-marginal lakes will develop due to glacier retreat and predict how these ice-margins will respond in a future warming world.The project will use a range of earth observation data plus high-resolution bed topography, in conjunction with surface mass balance and ice-sheet modelling, in order to achieve the following objectives:O1) Determine how glacier motion and surface elevation have changed, both at the ice-margin and inland, in recent decades in response to ice termination in proglacial lakes.O2) Determine what processes are driving the observed changes in ice motion and elevation.O3) Determine the upglacier geometry of the subglacial bed-topography around the GrIS margin.O4) Determine how ice-margins, susceptible to proglacial lake development, will respond dynamically to projected climate warming and with what implications for sea level rise?

该项目将研究前冰湖的形成对格陵兰冰盖的出口冰川长期动态稳定性的影响。该项目将利用一系列地球观测数据来研究前冰湖的形成对格陵兰冰盖的出口冰川长期动态稳定性的影响。更具体地说，该项目将量化 GrIS 周围的冰运动如何在空间和时间上对前冰川湖泊中的冰川终止做出反应，确定由于冰川退缩而形成的新冰缘湖泊的程度，并预测这些冰缘在未来变暖的世界中将如何反应。该项目将使用一系列地球观测数据加上高分辨率河床地形，结合表面质量平衡和冰盖建模，为了实现以下目标：O1) 确定近几十年来冰缘和内陆的冰川运动和地表高度如何变化，以响应冰期湖泊的冰终止。O2) 确定哪些过程正在驱动所观察到的冰运动和海拔变化。O3) 确定 GrIS 边缘周围冰下床地形的冰川上几何形状。O4) 确定冰缘、易受影响的冰缘几何形状。冰期湖泊的发展会对预计的气候变暖做出动态反应，并对海平面上升有何影响？