News
November 21, 2017
Join us for ISSM presentations and townhall at the AGU Fall meeting 2017 read this article

November 15, 2017
This study uses a numerical model to investigate the response of Nioghalvfjerdsfjorden (79North) and Zachariae Isstrøm (ZI) to ocean forcing over the coming decades. Our results show that 79North will retreat slowly over the next century, whearas ZI is in a state of irreversible retreat for the coming decades until it reaches a stabilizing ridge in the subglacial topography. The results demonstrate the potential of Northeast Greenland Ice Sheet to future sea-level rise and the role of ocean forcing on glacier dynamics. read this article

October 2, 2017
The new version of BedMachine Greenland is now available on NSIDC (https://nsidc.org/data/IDBMG4). BedMachine v3 now includes ocean bathymetry from single and multi beam data around the ice sheet, and the subglacial bed topography has been refined by incorporating additional ice thickness data. read this article

September 29, 2017
Jakobshavn Isbræ (JI) is a major marine terminating outlet glacier in Western Greenland. Following the disintegration of its ice tongue at the turn of the century, it has displayed widespread acceleration and mass loss. The causes for the acceleration remain unclear despite an abundance of observations and modeling studies. Here, we use ISSM to build the most comprehensive model of JI to date. We force the freely evolving, thermomechanical model with observed calving front positions, and reproduce 90% of the glacier’s observed changes. A detailed analysis reveals the mechanisms behind the glacier’s acceleration. read this article

June 19, 2017
The Amundsen Sea sector is experiencing the largest mass loss, glacier acceleration, and grounding line retreat in Antarctica. Enhanced intrusion of Circumpolar Deep Water onto the continental shelf has been proposed as the primary forcing mechanism for the retreat. Here we investigate the dynamics and evolution of Thwaites Glacier with a novel, fully coupled, ice-ocean numerical model. We obtain a significantly improved agreement with the observed pattern of glacial retreat using the coupled model. Coupled simulations over the coming decades indicate a continued mass loss at a sustained rate. Uncoupled simulations using a depth-dependent parameterization of sub-ice-shelf melt significantly overestimate the rate of grounding line retreat compared to the coupled model, as the parameterization does not capture the complexity of the ocean circulation associated with the formation of confined cavities during the retreat. Bed topography controls the pattern of grounding line retreat, while oceanic thermal forcing impacts the rate of grounding line retreat. The importance of oceanic forcing increases with time as Thwaites grounding line retreats farther inland. read this article