IceFlow

Map of the surface velocities in part of the North East Greenland ice stream

Map of the surface velocities in part of the North East Greenland ice stream (NEGIS) close to the EGRIP drill site (marked by a black line). A radio-echo-sounding (RES) image shows the internal structure of the ice in and around the ice stream.

The overall aim of IceFlow is to investigate how ice flows and ice streams influence the evolution of the Greenland ice sheet. 

We are developing new methods to measure ice-crystal-related parameters from the EGRIP ice core in the North East Greenland ice stream. In addition, borehole data, ice-core deformation, and basal observations are planned. We will combine these EGRIP measurements with large-scale observations of the ice stream from radars and drones to model the evolution of the ice stream and its flow pattern. To further investigate the impact of the ice fabric on flow, we will drill through one of the strange and large basal structures on the side of the ice stream with a rapid access drill. These observations will increase our understanding of how ice streams form and develop, and will feed into ice-stream models. The aim is to model the full ice-stream system including ocean interaction and grounding line processes.

The goals to be reached by IceFlow will lead to a much stronger scientific understanding, and possibly a breakthrough, in understanding the flow of ice in and around an ice stream. 

IceFlow is supported by the Villum Foundation.

Publications from the IceFlow team

 

Bons, PD, de Riese, T, Franke, S, Llorens, M-G, Sachau, T, Stoll, N, Weikusat, I, Westhoff, J & Zhang, Y (2021)
Comment on “Exceptionally high heat flux needed to sustain the Northeast Greenland Ice Stream” by Smith-Johnsen et al. (2020)
The Cryosphere, 15 (2251–2254).
Look up abstract/reprint using doi: 10.5194/tc-15-2251-2021

Christ, AJ, Bierman, PR, Schaefer, JM, Dahl-Jensen, D, Steffensen, JP, Corbett, LB, Peteet, DM, Thomas, EK, Steig, EJ, Rittenour, TM, Tison, JL, Blard, PH, Perdrial, N, Dethier, DP, Lini, A, Hidy, AJ, Caffee, MW & Southon, J (2021)
A multimillion-year-old record of Greenland vegetation and glacial history preserved in sediment beneath 1.4 km of ice at Camp Century
Proceedings of the National Academy of Sciences, 118 (13).
Look up abstract/reprint using doi: 10.1073/pnas.2021442118

Gerber, TA, Hvidberg, CS, Rasmussen, SO, Frank, S, Sinnl, G, Grinsted, A, Jensen, D & Dahl-Jensen, D (2021)
Upstream flow effects revealed in the EastGRIP ice core using Monte Carlo inversion of a two-dimensional ice-flow model
The Cryosphere, vol. 15, pp. 3655-3679
Look up abstract/reprint using doi: 10.5194/tc-15-3655-2021

Gkinis, V, Holme, C, Kahle, EC, Steven, MC, Steig, EJ & Vinther, BM (2021)
Numerical experimets on firn isotope diffusion with Community Firn Model
Journal of Glaciology, pp. 1-29.
Look up abstract/reprint using doi: 10.1017/jog.2021.1

Grinsted, A & Christensen, JH (2021)
The transient sensitivity of sea level rise
Ocean Science, vol. 17, pp. 181-186.
Look up abstract/reprint using doi: 10.5194/os-17-181-2021

Koldtoft, I, Grinsted, A, Vinther, B & Hvidberg, C (2021)
Ice thickness and volume of the Renland Ice Cap, East Greenland
Journal of Glaciology, pp. 1-13.
Look up abstract/reprint using doi: 10.1017/jog.2021.11

Lilien, DA, Steinhage, D, Taylor, D, Parrenin, F, Ritz, C, Mulvaney, R, Martín, C, Yan, JB, O'Neill, C, Frezzotti, M, Miller, H, Gogineni, P, Dahl-Jensen, D & Eisen, O (2021)
New radar constraints support presence of ice older than 1.5 Myr at Little Dome C
The Cryosphere: Brief communication, 15 (1881-1888).
Look up abstract/reprint using doi: 10.5194/tc-15-1881-2021

Prior-Jones, MR, Bagshaw, EA, Lees, J, Clare, L, Burrow, S, Werder, MA, Karlsson, NB, Dahl-Jensen, D, Chundley, TR, Christoffersen, P, Wadham, JL, Doyle, SH & Hubbard, B (2021)
Cryoegg: development and field trials of a wireless subglacial probe for deep, fast-moving ice
Journal of Glaciology, pp. 1-14.
Look up abstract/reprint using doi: 10.1017/jog.2021.16

Rathmann, N, Hvidberg, CS, Grinsted, A, Lilien, DA & Dahl-Jensen, D (2021)
Effect of an orientation-dependent non-linear grain fluidity on bulk directional enhancement factors
Journal of Glaciology, pp. 1-7.
Look up abstract/reprint using doi: 10.1017/jog.2020.117