Investigating the influence of meltwater runoff and near-terminus subglacial hydrology on the dynamics of Greenland's marine-terminating glacier margi

本项目将调查融水径流和近端冰下水文对排出格陵兰冰盖的海洋终止冰川动态稳定性的影响。本项目将使用一系列地球观测数据来调查冰盖径流、冰下水文和近端峡湾过程对排出格陵兰冰盖的MTGS动态稳定性的影响。更具体地说，该项目将量化格陵兰MTGS的冰运动如何在空间和时间上对冰下流量、接近末端的冰下水力效率以及崩解和正面(潜艇)消融的变化做出反应。该项目将通过以下目标完成：o1)在高空间和时间分辨率下，确定近几十年来在一组(~10)快速流动冰川上MTG的速度、终点位置和表面高度如何变化。o2)确定融水径流和冰下水力效率的季节/年际演变。o3)确定融水温度和相关海底融化速率的分布。

This project will investigate the influence of meltwater runoff and near-terminus subglacial hydrology on the dynamic stability of marine-terminating glaciers draining the Greenland Ice Sheet.This project will use a range of earth observation data to investigate the influence of ice-sheet runoff, subglacial hydrology and near-terminus fjord processes on the long-term dynamic stability of MTGs draining the GrIS. More specifically, the project will quantify how ice-motion at Greenland's MTGs has responded spatially and temporally to changes in subglacial discharge, near-terminus subglacial hydraulic efficiency and variations in calving and frontal (submarine) ablation. The project will be delivered via the following objectives:O1) Determine, at high spatial and temporal resolution, how MTG velocity, terminus position and surface elevation have changed in recent decades at a suite of (~10) fast-flowing glaciers.O2) Determine seasonal/inter-annual evolution in meltwater-runoff and subglacial hydraulic efficiency.O3) Determine the distribution of fjordwater temperatures and associated submarine melt-rates.O4) Determine how MTGs will respond dynamically to increased meltwater-runoff associated with projected climate warming.