SHMIP The subglacial hydrology model intercomparison Project

de Fleurian, Basile; Werder, Mauro A.; Beyer, Sebastian; Brinkerhoff, Douglas J.; Delaney, Ian; Dow, Christine F.; Downs, Jacob; Gagliardini, Olivier; Hoffman, Matthew James; Hooke, Roger LeB; Seguinot, Julien; Sommers, Aleah N.

doi:10.1017/jog.2018.78

Title: SHMIP The subglacial hydrology model intercomparison Project

Journal Article · 23 October 2018 · Journal of Glaciology

DOI: https://doi.org/10.1017/jog.2018.78 · OSTI ID:1544686

^[1]; Werder, Mauro A. ^[2]; Beyer, Sebastian ^[3]; Brinkerhoff, Douglas J. ^[4]; Delaney, Ian ^[2]; Dow, Christine F. ^[5]; Downs, Jacob ^[6];

^[7];

^[8]; Hooke, Roger LeB ^[9]; Seguinot, Julien ^[10]; Sommers, Aleah N. ^[11]

Univ. of Bergen and Bjerknes Centre for Climate Research, Bergen (Norway)
ETH Zurich (Switzerland)
Potsdam Institute for Climate Impact Research, Potsdam (Germany); Helmholtz Centre for Polar and Marine Research, Bremerhaven (Germany)
Univ. of Alaska, Fairbanks, AK (United States)
Univ. of Waterloo (Canada)
Univ. of Montana, Missoula, MT (United States)
Univ. of Grenoble (France)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Maine, Orono, ME (United States)
ETH Zurich (Switzerland); Hokkaido Univ., Sapporo (Japan)
Univ. of Colorado, Boulder, CO (United States)

Subglacial hydrology plays a key role in many glaciological processes, including ice dynamics via the modulation of basal sliding. Owing to the lack of an overarching theory, however, a variety of model approximations exist to represent the subglacial drainage system. The Subglacial Hydrology Model Intercomparison Project (SHMIP) provides a set of synthetic experiments to compare existing and future models. We present the results from 13 participating models with a focus on effective pressure and discharge. For many applications (e.g. steady states and annual variations, low input scenarios) a simple model, such as an inefficient-system-only model, a flowline or lumped model, or a porous-layer model provides results comparable to those of more complex models. However, when studying short term (e.g. diurnal) variations of the water pressure, the use of a two-dimensional model incorporating physical representations of both efficient and inefficient drainage systems yields results that are significantly different from those of simpler models and should be preferentially applied. The results also emphasise the role of water storage in the response of water pressure to transient recharge. Finally, we find that the localisation of moulins has a limited impact except in regions of sparse moulin density.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; Laboratory Directed Research and Development (LDRD)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1544686

Report Number(s):: LA-UR--18-30871

Journal Information:: Journal of Glaciology, Journal Name: Journal of Glaciology Journal Issue: 248 Vol. 64; ISSN 0022-1430

Publisher:: International Glaciological SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Dynamic response of the Greenland ice sheet to recent cooling Williams, Joshua J.; Gourmelen, Noel; Nienow, Peter Scientific Reports, Vol. 10, Issue 1 https://doi.org/10.1038/s41598-020-58355-2	journal	February 2020
ISMIP6 Antarctica: a multi-model ensemble of the Antarctic ice sheet evolution over the 21st century Seroussi, Hélène; Nowicki, Sophie; Payne, Antony J. The Cryosphere, Vol. 14, Issue 9 https://doi.org/10.5194/tc-14-3033-2020	journal	January 2020
A confined–unconfined aquifer model for subglacial hydrology and its application to the Northeast Greenland Ice Stream Beyer, Sebastian; Kleiner, Thomas; Aizinger, Vadym The Cryosphere, Vol. 12, Issue 12 https://doi.org/10.5194/tc-12-3931-2018	journal	January 2018
Quantification of seasonal and diurnal dynamics of subglacial channels using seismic observations on an Alpine glacier Nanni, Ugo; Gimbert, Florent; Vincent, Christian The Cryosphere, Vol. 14, Issue 5 https://doi.org/10.5194/tc-14-1475-2020	journal	May 2020
Glacial-cycle simulations of the Antarctic Ice Sheet with the Parallel Ice Sheet Model (PISM) – Part 1: Boundary conditions and climatic forcing Albrecht, Torsten; Winkelmann, Ricarda; Levermann, Anders The Cryosphere, Vol. 14, Issue 2 https://doi.org/10.5194/tc-14-599-2020	journal	January 2020
Constraining the geothermal heat flux in Greenland at regions of radar-detected basal water Rezvanbehbahani, Soroush; Stearns, Leigh A.; van der Veen, C. J. Journal of Glaciology, Vol. 65, Issue 254 https://doi.org/10.1017/jog.2019.79	journal	November 2019

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58 GEOSCIENCES
glacier hydrology
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PISM-SHMIP: PISM scripts for the Subglacial Hydrology Model Intercomparison Project Seguinot, Julien https://doi.org/10.5281/zenodo.1476357 The current record is supplemented by this software	software	November 2018
PISM-SHMIP: PISM scripts for the Subglacial Hydrology Model Intercomparison Project Seguinot, Julien https://doi.org/10.5281/zenodo.1476358 The current record is supplemented by this software	software	November 2018