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The cryosphere
Apr, 2019;12 (4): 1433-1460.

Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison.

Heiko Goelzer, Sophie Nowicki, Tamsin Edwards, Matthew Beckley, Ayako Abe-Ouchi, Andy Aschwanden, Reinhard Calov, Olivier Gagliardini, Fabien Gillet-Chaulet, Nicholas R Golledge, Jonathan Gregory, Ralf Greve, Angelika Humbert, Philippe Huybrechts, Joseph H Kennedy, Eric Larour, William H Lipscomb, Sébastien Le Clećh, Victoria Lee, Mathieu Morlighem, Frank Pattyn, Antony J Payne, Christian Rodehacke, Martin Rückamp, Fuyuki Saito, Nicole Schlegel, Helene Seroussi, Andrew Shepherd, Sainan Sun, Roderik van de Wal, Florian A Ziemen
Author Information
  1. Heiko Goelzer: Utrecht University, Institute for Marine and Atmospheric Research (IMAU), Utrecht, Netherlands.
  2. Sophie Nowicki: NASA GSFC, Cryospheric Sciences Branch, Greenbelt, USA.
  3. Tamsin Edwards: School of Environment, Earth & Ecosystem Sciences, The Open University, Milton Keynes, United Kingdom.
  4. Matthew Beckley: NASA GSFC, Cryospheric Sciences Branch, Greenbelt, USA.
  5. Ayako Abe-Ouchi: Atmosphere Ocean Research Institute, University of Tokyo, Kashiwa, Japan.
  6. Andy Aschwanden: Geophysical Institute, University of Alaska Fairbanks, USA.
  7. Reinhard Calov: Potsdam Institute for Climate Impact Research, Potsdam, Germany.
  8. Olivier Gagliardini: Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, F-38000 Grenoble, France.
  9. Fabien Gillet-Chaulet: Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, F-38000 Grenoble, France.
  10. Nicholas R Golledge: Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand.
  11. Jonathan Gregory: Department of Meteorology, University of Reading, Reading, United Kingdom.
  12. Ralf Greve: Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan.
  13. Angelika Humbert: Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany.
  14. Philippe Huybrechts: Vrije Universiteit Brussel, Brussels, Belgium.
  15. Joseph H Kennedy: Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, USA.
  16. Eric Larour: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USA.
  17. William H Lipscomb: Los Alamos National Laboratory, Los Alamos, USA.
  18. Sébastien Le Clećh: LSCE/IPSL, Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Gif-sur-Yvette, France.
  19. Victoria Lee: University of Bristol, Bristol, United Kingdom.
  20. Mathieu Morlighem: University of California Irvine, Irvine, USA.
  21. Frank Pattyn: Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, Belgium.
  22. Antony J Payne: University of Bristol, Bristol, United Kingdom.
  23. Christian Rodehacke: Danish Meteorological Institute, Copenhagen, Denmark.
  24. Martin Rückamp: Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany.
  25. Fuyuki Saito: Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan.
  26. Nicole Schlegel: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USA.
  27. Helene Seroussi: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USA.
  28. Andrew Shepherd: School of Earth and Environment, University of Leeds, United Kingdom.
  29. Sainan Sun: Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, Belgium.
  30. Roderik van de Wal: Utrecht University, Institute for Marine and Atmospheric Research (IMAU), Utrecht, Netherlands.
  31. Florian A Ziemen: Max Planck Institute for Meteorology, Hamburg, Germany.
PMID: 32676174 DOI: 10.5194/tc-12-1433-2018

Abstract

Earlier large-scale Greenland ice sheet sea-level projections (e.g., those run during the ice2sea and SeaRISE initiatives) have shown that ice sheet initial conditions have a large effect on the projections and give rise to important uncertainties. The goal of the initMIP-Greenland intercomparison exercise is to compare, evaluate and improve the initialisation techniques used in the ice sheet modelling community and to estimate the associated uncertainties in modelled mass changes. initMIP-Greenland is the first in a series of ice sheet model intercomparison activities within ISMIP6 (the Ice Sheet Model Intercomparison Project for CMIP6), which is the primary activity within the Coupled Model Intercomparison Project - phase 6 (CMIP6) focusing on the ice sheets. Two experiments for the large-scale Greenland ice sheet have been designed to allow intercomparison between participating models of 1) the initial present-day state of the ice sheet and 2) the response in two idealised forward experiments. The forward experiments serve to evaluate the initialisation in terms of model drift (forward run without additional forcing) and in response to a large perturbation (prescribed surface mass balance anomaly), and should not be interpreted as sea-level projections. We present and discuss results that highlight the diversity of data sets, boundary conditions and initialisation techniques used in the community to generate initial states of the Greenland ice sheet. We find good agreement across the ensemble for the dynamic response to surface mass balance changes in areas where the simulated ice sheets overlap, but differences arising from the initial size of the ice sheet. The model drift in the control experiment is reduced for models that participated in earlier intercomparison exercises.

References

  1. Proc Natl Acad Sci U S A. 2011 May 31;108(22):8978-83 [PMID: 21576500]
  2. Geosci Model Dev. 2016;9(12):4521-4545 [PMID: 29697697]
  3. J Geophys Res Earth Surf. 2015 Feb;120(2):212-241 [PMID: 26213664]
  4. Proc Natl Acad Sci U S A. 2013 Aug 27;110(35):14156-61 [PMID: 23940337]
  5. Curr Clim Change Rep. 2017;3(4):291-302 [PMID: 32010550]
  6. Science. 2009 Nov 13;326(5955):984-6 [PMID: 19965509]
  7. Science. 2005 Jul 15;309(5733):464-7 [PMID: 15947138]
  8. Nat Commun. 2014 Sep 29;5:5107 [PMID: 25263015]
  9. Nature. 2004 Sep 9;431(7005):147-51 [PMID: 15356621]
  10. Science. 2011 Oct 21;334(6054):347-51 [PMID: 21903776]
  11. Nature. 2013 May 9;497(7448):235-8 [PMID: 23657350]
  12. Geosci Model Dev. 2017;10(1):255-270 [PMID: 29697704]
  13. Science. 2015 Dec 11;350(6266):1357-61 [PMID: 26563135]
  14. Geophys Res Lett. 2017 Nov 16;44(21):11051-11061 [PMID: 29263561]
  15. Nature. 2015 Oct 15;526(7573):421-5 [PMID: 26469052]
  16. Nat Commun. 2016 Feb 01;7:10524 [PMID: 26830316]

Grants

  1. /Science Earth Science System NASA
Journal Article
Article has an altmetric score of 8

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