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

该项目将调查融水径流和近终点冰下水文对排干格陵兰冰盖的海洋终止冰川动态稳定性的影响，该项目将利用一系列地球观测数据调查冰盖径流、冰下水文和近终点峡湾过程对排干格陵兰岛的MTG长期动态稳定性的影响。更具体地说，该项目将量化格陵兰MTG的冰运动如何在空间和时间上对冰下流量，近终点冰下水力效率以及产犊和锋面（海底）消融变化的变化做出反应。该项目将通过以下目标交付：O 1）以高空间和时间分辨率确定MTG速度、终点位置和表面高程在近几十年来如何在一组（~10）快速流动的冰川上发生变化。O2）确定融水径流和冰下水力效率的季节/年际演变。O3）确定峡湾水温分布和相关的海底融化速率。O 4）确定MTG将如何动态响应与预计气候变暖相关的融水径流增加。

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.