Application of the Hillslope River Routing (HRR) terrestrial hydrology routing model to the Northwest Greenland Ice Sheet surface and proglacial zone

Authors: Sarah M. Simon*, Brown University Department of Earth, Environmental, and Planetary Science, The Institute at Brown for Environment and Society, Laurence C. Smith, Brown University Department of Earth, Environmental, and Planetary Science, The Institute at Brown for Environment and Society, Colin J. Gleason, University of Massachusetts, Amherst Department of Civil and Environmental Engineering, Lincoln H Pitcher, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder
Topics: Cryosphere, Remote Sensing, Earth Science
Keywords: Cryosphere, hydrology, remote sensing
Session Type: Virtual Paper
Presentation File: No File Uploaded


Meltwater runoff from the Greenland Ice Sheet (GrIS) is an increasingly significant contributor to global sea level rise. Future projections of GrIS runoff require accurate simulation by regional climate models (RCMs), which currently do not account for the complex routing of meltwater across both the GrIS surface and through downstream proglacial zones. To help address this, we apply the Hillslope River Routing (HRR) terrestrial hydrology routing model to both the glaciated and proglacial zone of the Minturn Elv river, located in Inglefield Land, Northwest Greenland. This enables routing of supraglacial meltwater through a recently installed proglacial discharge monitoring station located ~21 km downstream of the ice edge. HRR simulations are forced with RCM outputs and integrate a stream network and water balance model to produce mass- and energy-conserved estimates of meltwater runoff in Northwest Greenland. This work investigates the utility of mass and momentum balance-based hydrologic modelling approaches to improve accuracy of RCM estimates of GrIS meltwater discharge to the global ocean.

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