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

本项目将研究冰川湖泊形成对排放格陵兰冰盖的出口冰川长期动态稳定性的影响。本项目将利用一系列地球观测数据来研究冰川湖泊形成对排放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GRI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新的冰缘湖泊的程度，并预测这些冰缘将如何在未来变暖的世界中做出反应。该项目将使用一系列地球观测数据和高分辨率的床面地形，结合地表物质平衡和冰盖模拟，以实现以下目标：O1)确定冰缘和内陆冰川运动和表面海拔的变化，O2)确定是什么过程推动了观测到的冰川运动和海拔的变化。o3)确定了冰下冰床的上冰川几何形状--GRIS边缘周围的地形。o4)确定易受冰川湖泊发展影响的冰缘将如何对预计的气候变暖作出动态反应，以及对海平面上升有什么影响？

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?