InitMIP-Antarctica: An ice sheet model initialization experiment of ISMIP6

Helene Seroussi; Sophie Nowicki; Erika Simon; Ayako Abe-Ouchi; Torsten Albrecht; Julien Brondex; Stephen Cornford; Christophe Dumas; Fabien Gillet-Chaulet; Heiko Goelzer; Nicholas R. Golledge; Jonathan M. Gregory; Ralf Greve; Matthew J. Hoffman; Angelika Humbert; Philippe Huybrechts; Thomas Kleiner; Eric Larour; Gunter Leguy; William H. Lipscomb; Daniel Lowry; Matthias Mengel; Mathieu Morlighem; Frank Pattyn; Anthony J. Payne; David Pollard; Stephen F. Price; Aurelien Quiquet; Thomas J. Reerink; Ronja Reese; Christian B. Rodehacke; Nicole Jeanne Schlegel; Andrew Shepherd; Sainan Sun; Johannes Sutter; Jonas Van Breedam; Roderik S.W. Van De Wal; Ricarda Winkelmann; Tong Zhang

doi:10.5194/tc-13-1441-2019

InitMIP-Antarctica: An ice sheet model initialization experiment of ISMIP6

Helene Seroussi^*
, Sophie Nowicki
, Erika Simon
, Ayako Abe-Ouchi
, Torsten Albrecht
, Julien Brondex
, Stephen Cornford
, Christophe Dumas
, Fabien Gillet-Chaulet
, Heiko Goelzer
, Nicholas R. Golledge
, Jonathan M. Gregory
, Ralf Greve
, Matthew J. Hoffman
, Angelika Humbert
, Philippe Huybrechts
, Thomas Kleiner
, Eric Larour
, Gunter Leguy
, William H. Lipscomb

Daniel Lowry, Matthias Mengel, Mathieu Morlighem, Frank Pattyn, Anthony J. Payne, David Pollard, Stephen F. Price, Aurelien Quiquet, Thomas J. Reerink, Ronja Reese, Christian B. Rodehacke, Nicole Jeanne Schlegel, Andrew Shepherd, Sainan Sun, Johannes Sutter, Jonas Van Breedam, Roderik S.W. Van De Wal, Ricarda Winkelmann, Tong Zhang

^*Corresponding author for this work

Jet Propulsion Laboratory, California Institute of Technology
NASA Goddard Space Flight Center
The University of Tokyo
Member of the Leibniz Association
Université Grenoble Alpes
Swansea University
Université de Versailles Saint-Quentin-en-Yvelines
Victoria University of Wellington
University of Reading
Hokkaido University
Los Alamos National Laboratory
Alfred Wegener Institute - Helmholtz Centre for Polar and Marine Research
University of Bremen
Vrije Universiteit Brussel
National Center for Atmospheric Research
University of California at Irvine
Université libre de Bruxelles
University of Bristol
Pennsylvania State University
Danish Meteorological Institute
University of Leeds
University of Bern
University of Potsdam

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Ice sheet numerical modeling is an important tool to estimate the dynamic contribution of the Antarctic ice sheet to sea level rise over the coming centuries. The influence of initial conditions on ice sheet model simulations, however, is still unclear. To better understand this influence, an initial state intercomparison exercise (initMIP) has been developed to compare, evaluate, and improve initialization procedures and estimate their impact on century-scale simulations. initMIP is the first set of experiments of the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6), which is the primary Coupled Model Intercomparison Project Phase 6 (CMIP6) activity focusing on the Greenland and Antarctic ice sheets. Following initMIP-Greenland, initMIP-Antarctica has been designed to explore uncertainties associated with model initialization and spin-up and to evaluate the impact of changes in external forcings. Starting from the state of the Antarctic ice sheet at the end of the initialization procedure, three forward experiments are each run for 100 years: a control run, a run with a surface mass balance anomaly, and a run with a basal melting anomaly beneath floating ice. This study presents the results of initMIP-Antarctica from 25 simulations performed by 16 international modeling groups. The submitted results use different initial conditions and initialization methods, as well as ice flow model parameters and reference external forcings. We find a good agreement among model responses to the surface mass balance anomaly but large variations in responses to the basal melting anomaly. These variations can be attributed to differences in the extent of ice shelves and their upstream tributaries, the numerical treatment of grounding line, and the initial ocean conditions applied, suggesting that ongoing efforts to better represent ice shelves in continental-scale models should continue.

Original language	English
Pages (from-to)	1441-1471
Number of pages	31
Journal	Cryosphere
Volume	13
Issue number	5
DOIs	https://doi.org/10.5194/tc-13-1441-2019
Publication status	Published - 14 May 2019

Funding

Acknowledgements. We acknowledge the Climate and Cryosphere (CliC) project and the World Climate Research Programme (WCRP) for their guidance, support, and sponsorship. We thank the CMIP6 panel members for their continuous leadership of the CMIP6 effort and the Working Group on Coupled Modeling (WGCM) Infrastructure Panel (WIP) for overseeing the CMIP6 and ISMIP6 infrastructure and data request. Research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). Hélène Seroussi, Nicole-Jeanne Schlegel, Eric Larour, Sophie Nowicki, and Erika Simon are supported by grants from the NASA Cryospheric Science, Sea Level Change Team, and Modeling Analysis and Prediction Program. Material is based upon work supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation under Co-operative Agreement no. 1852977. Computing and data storage resources for CISM simulations, including the Cheyenne supercomputer (https://doi.org/10.5065/D6RX99HX), were provided by the Computational and Information Systems Laboratory (CISL) at NCAR. Ralf Greve was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI grant numbers JP16H02224, JP17H06104, and JP17H06323. Christian Rodehacke (DMI) has received funding from the European Research Council under the European Community’s Seventh Framework Programme (FP7) for research, and Theme 6 Environment as part of the NACLIM (North Atlantic Climate) project (grant agreement 308299), as well as the Nordic Centers of Excellence eSTICC (eScience Tool for Investigating Climate Change at High Northern Latitudes) funded by Nordforsk (grant 57001). Support for Matthew J. Hoffman, Stephen F. Price, and Tong Zhang was provided through the Scientific Discovery through Advanced Computing (SciDAC) program funded by the US Department of Energy Office of Science, Biological and Environmental Research and Advanced Scientific Computing Research programs. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the US Department of Energy under contract no. DE-AC02-05CH11231. The Ministry of Education, Culture and Science (OCW), in the Netherlands, provided financial support for this study via the program of the Netherlands Earth System Science Centre (NESSC). The work of Thomas Kleiner and Angelika Hum-bert has been conducted in the framework of the PalMod project (FKZ: 01LP1511B), supported by the German Federal Ministry of Education and Research (BMBF) as Research for Sustainability initiative (FONA). Aurélien Quiquet acknowledges funding from the European Research Council grant ACCLIMATE no. 339108. Fa-bien Gillet-Chaulet and Julien Brondex (IGE) have received funding from the French National Research Agency (ANR) under the TROIS-AS project (ANR-15-CE01-0005-01). IGE-ELMER simu- lations were performed using HPC resources from GENCI-CINES (grant 2017-016066) and using the Froggy platform of the CI-MENT infrastructure, which is supported by the Rhone-Alpes region (grant CPER07_13 CIRA), the OSUG@2020 laBex (reference ANR10 LABX56), and the Equip@Meso project (reference ANR-10-EQPX-29-01). Torsten Albrecht was supported by the Deutsche Forschungsgemeinschaft (DFG) in the framework of the priority program “Antarctic Research with comparative investigations in Arctic ice areas” by grant LE1448/6-1 and LE1448/7-1. Matthias Mengel was supported by the DFG in the same frame-work by grant WI 4556/4-1. Development of PISM is supported by NASA grant NNX17AG65G and NSF grants PLR-1603799 and PLR-1644277. The authors gratefully acknowledge the European Regional Development Fund (ERDF), the German Federal Ministry of Education and Research, and the Land Brandenburg for supporting this project by providing resources on the high-performance computer system at the Potsdam Institute for Climate Impact Research. Computer resources for this project have also been provided by the Gauss Centre for Supercomputing/Leibniz Supercomputing Centre under Project-ID pr94ga. Mathieu Morlighem was supported by a grant from the National Science Foundation, Office of Polar Programs (OPP; grant no. 1443229). Sainan Sun was supported by the FRS-FNRS MEDRISM project and the BELSPO MIMO project (Stereo III). Philippe Huybrechts and Jonas Van Breedam acknowledge support from the iceMOD project funded by the Research Foundation – Flanders (FWO-Vlaanderen). Daniel Lowry acknowledges support from the Antarctica New Zealand Doctoral Scholarship program and the New Zealand Ministry of Business, Innovation and Employment (grant 15-VUW-131).

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Seroussi, H., Nowicki, S., Simon, E., Abe-Ouchi, A., Albrecht, T., Brondex, J., Cornford, S., Dumas, C., Gillet-Chaulet, F., Goelzer, H., Golledge, N. R., Gregory, J. M., Greve, R., Hoffman, M. J., Humbert, A., Huybrechts, P., Kleiner, T., Larour, E., Leguy, G., ... Zhang, T. (2019). InitMIP-Antarctica: An ice sheet model initialization experiment of ISMIP6. Cryosphere, 13(5), 1441-1471. https://doi.org/10.5194/tc-13-1441-2019

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abstract = "Ice sheet numerical modeling is an important tool to estimate the dynamic contribution of the Antarctic ice sheet to sea level rise over the coming centuries. The influence of initial conditions on ice sheet model simulations, however, is still unclear. To better understand this influence, an initial state intercomparison exercise (initMIP) has been developed to compare, evaluate, and improve initialization procedures and estimate their impact on century-scale simulations. initMIP is the first set of experiments of the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6), which is the primary Coupled Model Intercomparison Project Phase 6 (CMIP6) activity focusing on the Greenland and Antarctic ice sheets. Following initMIP-Greenland, initMIP-Antarctica has been designed to explore uncertainties associated with model initialization and spin-up and to evaluate the impact of changes in external forcings. Starting from the state of the Antarctic ice sheet at the end of the initialization procedure, three forward experiments are each run for 100 years: a control run, a run with a surface mass balance anomaly, and a run with a basal melting anomaly beneath floating ice. This study presents the results of initMIP-Antarctica from 25 simulations performed by 16 international modeling groups. The submitted results use different initial conditions and initialization methods, as well as ice flow model parameters and reference external forcings. We find a good agreement among model responses to the surface mass balance anomaly but large variations in responses to the basal melting anomaly. These variations can be attributed to differences in the extent of ice shelves and their upstream tributaries, the numerical treatment of grounding line, and the initial ocean conditions applied, suggesting that ongoing efforts to better represent ice shelves in continental-scale models should continue.",

author = "Helene Seroussi and Sophie Nowicki and Erika Simon and Ayako Abe-Ouchi and Torsten Albrecht and Julien Brondex and Stephen Cornford and Christophe Dumas and Fabien Gillet-Chaulet and Heiko Goelzer and Golledge, \{Nicholas R.\} and Gregory, \{Jonathan M.\} and Ralf Greve and Hoffman, \{Matthew J.\} and Angelika Humbert and Philippe Huybrechts and Thomas Kleiner and Eric Larour and Gunter Leguy and Lipscomb, \{William H.\} and Daniel Lowry and Matthias Mengel and Mathieu Morlighem and Frank Pattyn and Payne, \{Anthony J.\} and David Pollard and Price, \{Stephen F.\} and Aurelien Quiquet and Reerink, \{Thomas J.\} and Ronja Reese and Rodehacke, \{Christian B.\} and Schlegel, \{Nicole Jeanne\} and Andrew Shepherd and Sainan Sun and Johannes Sutter and \{Van Breedam\}, Jonas and \{Van De Wal\}, \{Roderik S.W.\} and Ricarda Winkelmann and Tong Zhang",

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doi = "10.5194/tc-13-1441-2019",

language = "English",

volume = "13",

pages = "1441--1471",

journal = "Cryosphere",

issn = "1994-0416",

publisher = "Copernicus Publications",

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Seroussi, H, Nowicki, S, Simon, E, Abe-Ouchi, A, Albrecht, T, Brondex, J, Cornford, S, Dumas, C, Gillet-Chaulet, F, Goelzer, H, Golledge, NR, Gregory, JM, Greve, R, Hoffman, MJ, Humbert, A, Huybrechts, P, Kleiner, T, Larour, E, Leguy, G, Lipscomb, WH, Lowry, D, Mengel, M, Morlighem, M, Pattyn, F, Payne, AJ, Pollard, D, Price, SF, Quiquet, A, Reerink, TJ, Reese, R, Rodehacke, CB, Schlegel, NJ, Shepherd, A, Sun, S, Sutter, J, Van Breedam, J, Van De Wal, RSW, Winkelmann, R & Zhang, T 2019, 'InitMIP-Antarctica: An ice sheet model initialization experiment of ISMIP6', Cryosphere, vol. 13, no. 5, pp. 1441-1471. https://doi.org/10.5194/tc-13-1441-2019

TY - JOUR

T1 - InitMIP-Antarctica

T2 - An ice sheet model initialization experiment of ISMIP6

AU - Seroussi, Helene

AU - Nowicki, Sophie

AU - Simon, Erika

AU - Abe-Ouchi, Ayako

AU - Albrecht, Torsten

AU - Brondex, Julien

AU - Cornford, Stephen

AU - Dumas, Christophe

AU - Gillet-Chaulet, Fabien

AU - Goelzer, Heiko

AU - Golledge, Nicholas R.

AU - Gregory, Jonathan M.

AU - Greve, Ralf

AU - Hoffman, Matthew J.

AU - Humbert, Angelika

AU - Huybrechts, Philippe

AU - Kleiner, Thomas

AU - Larour, Eric

AU - Leguy, Gunter

AU - Lipscomb, William H.

AU - Lowry, Daniel

AU - Mengel, Matthias

AU - Morlighem, Mathieu

AU - Pattyn, Frank

AU - Payne, Anthony J.

AU - Pollard, David

AU - Price, Stephen F.

AU - Quiquet, Aurelien

AU - Reerink, Thomas J.

AU - Reese, Ronja

AU - Rodehacke, Christian B.

AU - Schlegel, Nicole Jeanne

AU - Shepherd, Andrew

AU - Sun, Sainan

AU - Sutter, Johannes

AU - Van Breedam, Jonas

AU - Van De Wal, Roderik S.W.

AU - Winkelmann, Ricarda

AU - Zhang, Tong

PY - 2019/5/14

Y1 - 2019/5/14

N2 - Ice sheet numerical modeling is an important tool to estimate the dynamic contribution of the Antarctic ice sheet to sea level rise over the coming centuries. The influence of initial conditions on ice sheet model simulations, however, is still unclear. To better understand this influence, an initial state intercomparison exercise (initMIP) has been developed to compare, evaluate, and improve initialization procedures and estimate their impact on century-scale simulations. initMIP is the first set of experiments of the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6), which is the primary Coupled Model Intercomparison Project Phase 6 (CMIP6) activity focusing on the Greenland and Antarctic ice sheets. Following initMIP-Greenland, initMIP-Antarctica has been designed to explore uncertainties associated with model initialization and spin-up and to evaluate the impact of changes in external forcings. Starting from the state of the Antarctic ice sheet at the end of the initialization procedure, three forward experiments are each run for 100 years: a control run, a run with a surface mass balance anomaly, and a run with a basal melting anomaly beneath floating ice. This study presents the results of initMIP-Antarctica from 25 simulations performed by 16 international modeling groups. The submitted results use different initial conditions and initialization methods, as well as ice flow model parameters and reference external forcings. We find a good agreement among model responses to the surface mass balance anomaly but large variations in responses to the basal melting anomaly. These variations can be attributed to differences in the extent of ice shelves and their upstream tributaries, the numerical treatment of grounding line, and the initial ocean conditions applied, suggesting that ongoing efforts to better represent ice shelves in continental-scale models should continue.

AB - Ice sheet numerical modeling is an important tool to estimate the dynamic contribution of the Antarctic ice sheet to sea level rise over the coming centuries. The influence of initial conditions on ice sheet model simulations, however, is still unclear. To better understand this influence, an initial state intercomparison exercise (initMIP) has been developed to compare, evaluate, and improve initialization procedures and estimate their impact on century-scale simulations. initMIP is the first set of experiments of the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6), which is the primary Coupled Model Intercomparison Project Phase 6 (CMIP6) activity focusing on the Greenland and Antarctic ice sheets. Following initMIP-Greenland, initMIP-Antarctica has been designed to explore uncertainties associated with model initialization and spin-up and to evaluate the impact of changes in external forcings. Starting from the state of the Antarctic ice sheet at the end of the initialization procedure, three forward experiments are each run for 100 years: a control run, a run with a surface mass balance anomaly, and a run with a basal melting anomaly beneath floating ice. This study presents the results of initMIP-Antarctica from 25 simulations performed by 16 international modeling groups. The submitted results use different initial conditions and initialization methods, as well as ice flow model parameters and reference external forcings. We find a good agreement among model responses to the surface mass balance anomaly but large variations in responses to the basal melting anomaly. These variations can be attributed to differences in the extent of ice shelves and their upstream tributaries, the numerical treatment of grounding line, and the initial ocean conditions applied, suggesting that ongoing efforts to better represent ice shelves in continental-scale models should continue.

UR - https://www.scopus.com/pages/publications/85065988446

U2 - 10.5194/tc-13-1441-2019

DO - 10.5194/tc-13-1441-2019

M3 - Article

AN - SCOPUS:85065988446

SN - 1994-0416

VL - 13

SP - 1441

EP - 1471

JO - Cryosphere

JF - Cryosphere

IS - 5

ER -

InitMIP-Antarctica: An ice sheet model initialization experiment of ISMIP6

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