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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

If you plan to do both, please complete two slides

Group name

Model name

Participants

Model characteristics

Include items like grid, typical resolution, sliding laws, initialization method…

Topic of interest

This would be for example a specific aspect of ISMIP7 that you would like to explore

Fun fact or figure

Number of variants

This is an indication of how many model variants you would like to contribute

Number of 200 yr runs

This is an indication of how many simulations you would like to contribute

Instructions: Copy this slide, and modify it for your group :). Delete this gray box

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Greenland

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GrIS

Group name

NORCE

Model name

CISM – Community Ice Sheet Model

Participants

Heiko Goelzer, Maria Paz Lira, Michele Petrini, Dave Chandler

Model characteristics

Regular grid, typical resolution 4km, Diva solver, regularized coulomb or powerlaw sliding, Calibration to match observed surface elevation.

Topic of interest

Explore ISM parametric uncertainty

Fun fact or figure

The .F90 source code of CISM has 137505 lines and the word “ismip” occurs in 36 of them.

Number of variants

10 (different initial states, parametric uncertainty)

Number of 200 yr runs

100 for each version

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GrIS

Group name

VUW-USF

Model name

PISM

Participants

Nick Golledge, Dan Lowry, Alanna Alevropoulos-Borrill

Model characteristics

Regular grid; 2km resolution; Hybrid SIA+SSA; pseudo-plastic sliding law; spin-up with iterative nudging

Topic of interest

parametric uncertainty, “Overshoot” scenarios

Fun fact or figure

VUW ISMIP6 simulations were run on the Rāpoi cluster. Rāpoi can be translated as “to hang together in a cluster” in Te Reo Māori

Number of variants

TBD; We plan on submitting with two different basal melt and grounding line parameterizations at the very least

Number of 200 yr runs

Ideally for all experiments

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GrIS

Group name

GEUS

Model name

PISM

Participants

Synne H. Svendsen, Anne M. Solgaard, Signe H. Larsen, Nanna B. Karlsson

Model characteristics

2-5 km spinup method TBD

Topic of interest

Possibly higher order dynamics

Fun fact or figure

Number of variants

TBD

Number of 200 yr runs

TBD

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GIS

Group name

DOE-LANL

Model name

MALI

Participants

Matt Hoffman, Trevor Hillebrand

Model characteristics

Unstructured variable-resolution Voronoi grid, targeting finest resolution of 1 km; plan to use Budd or regularized Coulomb sliding law with coupling to subglacial hydrology model (or possibly parameterization); initialization through PDE-constrained optimization for tuning basal friction and ice stiffness with steady-state ice temperature field; Blatter-Pattyn or MOLHO velocity solver; crevasse-depth calving law

Topic of interest

uncertainty quantification; Earth-system model coupling

Fun fact or figure

MALI did not participate in Greenland projections for ISMIP6, but has been used in a handful of Greenland regional studies

Number of variants

1-5

Number of 200 yr runs

up to a few dozen at high resolution

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GrIS

Group name

University of Montana

Model name

SpecEIS (with new GPU dy-core)

Participants

Doug Brinkerhoff

Model characteristics

Structured grid, SSA or MOLHO, Budd sliding, uniform 1km resolution, Data-constrained spin-up

Topic of interest

Uncertainty quantification

Fun fact or figure

Number of variants

As needed

Number of 200 yr runs

As needed. This model is very fast (20yrs simulation time / second on a laptop), so we can do a lot - 1000s?

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GrIS

Group name

IGE

Model name

Elmer/Ice

Participants

C. Mosbeux, F. Gillet-Chaulet, N. Jourdain, G. Durand…

Model characteristics

FEM, Unstructured (1-50 km), SSA, DA initialisation

Topic of interest

Friction law, moving front

Fun fact or figure

Number of variants

Depends on the set and number of experiments (likely 2-3)

Number of 200 yr runs

Approx 10-20

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GrIS

Group name

Dartmouth

Model name

ISSM

Participants

H. Shields, M. Morlighem, H. Seroussi, Cheng Gong

Model characteristics

FEM, Unstructured (1-20 km), HO, Transient calibration

Topic of interest

Friction law, moving front

Fun fact or figure

ISSM used to be “Ice Sheet System Model” and was renamed “Ice-sheet and Sea-level System Model” after we added a sea level solver 5 years ago. We managed to keep the same acronym :)

Number of variants

TBD

Number of 200 yr runs

Approx 10-20

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

GrIS

Group name

PalMA

Model name

Yelmo

Participants

Alexander Robinson, Javier Blasco, Jan Swierczek-Jereczek Lucía Gutiérrez-González, Marisa Montoya, Jorge Alvarez-Solas

Model characteristics

Regular grid (4km, 8km or 16km); DIVA approximation; regularized Coulomb friction law; initialization optimizing the basal friction to minimize ice thickness errors

Topic of interest

TBD

Fun fact or figure

Yelmo is named after a mountain in the Gaudarrama

Mountains (Madrid) that has the shape of an ice sheet.

Number of variants

TBD

Number of 200 yr runs

As needed

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Antarctica

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

PSU-UT

Model name

PSU-ISM

Participants

Ruthie Halberstadt, Sara Peters

Model characteristics

Regular grid; 10 or 20km resolution; Hybrid SIA+SSA; basal sliding inversion field; initial conditions from transient glacial cycle simulation

Topic of interest

model-data comparison, dependence on initial conditions

Fun fact or figure

We are newbies to ISMIP! This will be our first time participating.

Number of variants

TBD

Number of 200 yr runs

Ideally for all experiments

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

PIK/MPI-GEA

Model name

PISM

Participants

Torsten Albrecht, Ann Kristin Klose

Model characteristics

Hybrid SIA+SSA; Regular grid; 4/8 km resolution; Pseudo-plastic sliding law; Historical spin-up (incl scoring against obs trends)

Topic of interest

Exploring role of different processes for sea-level projections: GIA, Subglacial hydrology …

Fun fact or figure

For more than 20 years, PISM’s main research software engineer Constantine Khrulev has ensured the model’s stability and growth by maintaining, restructuring, and modernizing its code in more than 11000 commits. His deep technical insight and long-term commitment have been essential to the model’s reliability, user-friendliness and continued development.

Number of variants

TBD

Number of 200 yr runs

TBD

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

VUW-USF

Model name

PISM

Participants

Nick Golledge, Dan Lowry, Alanna Alevropoulos-Borrill

Model characteristics

Regular grid; 4 and 8km resolution; Hybrid SIA+SSA; pseudo-plastic sliding law; spin-up with iterative nudging

Topic of interest

parametric uncertainty, “Overshoot” scenarios

Fun fact or figure

VUW ISMIP6 simulations were run on the Rāpoi cluster. Rāpoi can be translated as “to hang together in a cluster” in Te Reo Māori

Number of variants

TBD; We plan on submitting with two different basal melt and grounding line parameterizations at the very least

Number of 200 yr runs

Ideally for all experiments

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

DOE-LANL

Model name

MALI

Participants

Matt Hoffman, Trevor Hillebrand

Model characteristics

Unstructured variable-resolution Voronoi grid, targeting finest resolution of 2 km; plan to use Budd or regularized Coulomb sliding law with coupling to subglacial hydrology model (or possibly parameterization); initialization through PDE-constrained optimization for tuning basal friction and ice stiffness with steady-state ice temperature field; Blatter-Pattyn or MOLHO velocity solver; crevasse-depth calving law; global 1-d GIA/Sea-level model

Topic of interest

GIA, subglacial hydrology, uncertainty quantification

Fun fact or figure

MALI is jointly developed between Los Alamos and Sandia national labs and is the ice-sheet component of the US Department of Energy’s Energy Exascale Earth System Model (E3SM)

Number of variants

1-5

Number of 200 yr runs

up to a few dozen at high resolution

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

University of Montana

Model name

SpecEIS (with new GPU dy-core)

Participants

Doug Brinkerhoff

Model characteristics

Structured grid, SSA or MOLHO, Budd sliding, uniform 1km resolution, Data-constrained spin-up

Topic of interest

Uncertainty quantification, collapse scenarios

Fun fact or figure

Number of variants

As needed

Number of 200 yr runs

As needed. This model is very fast (20yrs simulation time / second on a laptop), so we can do a lot - 1000s?

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

Dartmouth College

Model name

ISSM (Ice-sheet and Sea-level System Model)

Participants

Tobias Harvey, Justine Caillet, Hugh Shields,Mathieu Morlighem, Helene Seroussi

Model characteristics

Unstructured anisotropic mesh (2-30 km), SSA or MOLHO, Budd sliding, transient calibration with AD if possible, ISMIP6 melt parameterization

Topic of interest

Ice shelt melt or calving

Fun fact or figure

First ISSM workshop was exactly 14 years ago

(December 13th, 2011)

Number of variants

Unknown (discussions with other ISSM groups)

Number of 200 yr runs

10s

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

Arête Glacier Initiative

Model name

MALI (MPAS-Albany Land Ice model)

Participants

Holly Han, Colin Meyer, Brent Minchew

Model characteristics

Unstructured variable-resolution Voronoi grid (will most likely use 4-20 km resolution). Flexibility in using different physics packages (e.g., gravitationally consistent 1D sea-level/GIA physis,c calving, subglacial hydrology, temperature, velocity solver).

Topic of interest

Sea-level/GIA feedback, Basal sliding law, sweeping a broad range of parameter space of various physics.

Fun fact or figure

Another meaning of Arête is a Greek philosophy about excellence or realizing one’s fullest potential (https://en.wikipedia.org/wiki/Arete).

Number of variants

TBD

Number of 200 yr runs

TBD

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

KOPRI (Korea Polar Research Institute)

Model name

ISSM-KOPRI

Participants

In-Woo Park, Won Sang Lee, Emilia Kyung Jin

Model characteristics

Unstructured anisotropic mesh (1 km - 10 km), Budd-type friction law (effective pressure from subglacial hydrology model, CUAS or Shakti), Ice flow model with 2D SSA or 3D Higher Order (HO), Surface melting parameterization (SEMIC)

Topic of interest

Friction law connected with subglacial hydrology model, sub-ice shelf melting parameterization from 2D plume model

Fun fact or figure

Number of variants

TBD (Discussed in ISMIP7)

Number of 200 yr runs

TBD (Discussed in ISMIP7)

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

KOPRI (Korea Polar Research Institute)

Model name

PISM-KOPRI

Participants

Won Sang Lee, In-Woo Park

Model characteristics

Regular Cartesian grid at 8 km and native 4 km (EPSG:3031; 8 km = 761 × 761) for calibrated spinup and projections; 200 kyr paleo thermal spinup at 16 km, grid-sequenced to 8 km (Albrecht 2020-style); SSA+SIA hybrid stress balance; pseudo-plastic sliding with topography-dependent till yield strength (Albrecht et al. 2020, Table 1); PICO sub-shelf melt with per-basin δT calibration against Paolo & Adusumilli observations on IMBIE v3 basins.

Topic of interest

Sensitivity of the projected Antarctic sea-level contribution to (i) ocean-driven sub-shelf melt, the dominant source of inter-model spread, using per-basin melt forcing calibrated against satellite observations (Paolo & Adusumilli, IMBIE v3 basins); and (ii) horizontal resolution, contrasting native 8 km and 4 km to quantify the resolution sensitivity of Amundsen Sea Embayment grounding-line discharge. Toward observationally-constrained probabilistic projection via parameter-space sensitivity.

Fun fact or figure

PISM-KOPRI runs on our “Simba” HPC cluster, named in keeping with our international LIONESS consortium (Land/Ice-Ocean Network Exploration using Semiautonomous Systems) for polar research. Future cluster nodes will continue the Lion King theme (e.g., Kiara already operational)

Number of variants

Number of variants: 2; PISM-KOPRI at 8 km (m001) and native 4 km (m002), identical physics/forcing, contributed to quantify resolution sensitivity of the Antarctic response.

Number of 200 yr runs

11 (full Core experiment suite: 2 ESMs × 5 experiments [Historical + SSP126/370/585 + CTRL2015] + 1 OCX)

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

IGE

Model name

Elmer/Ice

Participants

C. Mosbeux, N. Jourdain, F. Gillet-Chaulet, G. Durand…

Model characteristics

FEM, Unstructured (1-50 km), SSA, DA initialisation

Topic of interest

Friction laws, damage, moving front, coupling with the ocean and atmosphere

Fun fact or figure

Number of variants

Depends on the set and number of experiments (likely 2-3)

Number of 200 yr runs

Approx 10-20

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

Monash

Model name

the Ice-sheet and Sea-level System Model

Participants

Johanna Beckmann, Felicity McCormack, …

Model characteristics

FEM, unstructured (3-50 km), SSA, DA initialisation

Topic of interest

Basal melt, sensitivity to climate forcings, maybe 1850s initialisation

Fun fact or figure

Number of variants

Will discuss with other ISSM groups

Number of 200 yr runs

10s

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ISMIP7 participants - expression of interest

Domain (AIS or GrIS)

AIS

Group name

PalMA

Model name

Yelmo

Participants

Alexander Robinson, Javier Blasco, Jan Swierczek-Jereczek Lucía Gutiérrez-González, Marisa Montoya, Jorge Alvarez-Solas

Model characteristics

Regular grid (4km, 8km or 16km); DIVA approximation; regularized Coulomb friction law; initialization optimizing the basal friction to minimize ice thickness errors

Topic of interest

TBD

Fun fact or figure

Yelmo is named after a mountain in the Gaudarrama

Mountains (Madrid) that has the shape of an ice sheet.

Number of variants

TBD

Number of 200 yr runs

As needed

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