Design and results of the ice sheet model initialisation experiments initMIP-Greenland [electronic resource] : an ISMIP6 intercomparison
- Washington, D.C. : United States. Dept. of Energy. Office of Science, 2018. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 1,433-1,460 : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory, United States. Department of Energy. Office of Science, National Aeronautics and Space Administration Announcement, National Science Foundation (U.S.), and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- 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. Here, the goal of this 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); they 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.
- Published through SciTech Connect., 04/19/2018., The Cryosphere (Online) 12 4 ISSN 1994-0424 AM, and 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; Sebastien Le clec'h; Victoria Lee; Mathieu Morlighem; Frank Pattyn; Antony J. Payne; Christian Rodehacke; Martin Ruckamp; Fuyuki Saito; et al.
- Funding Information:
- AC05-00OR22725, 610055, 57001, CPER07_13 CIRA, 2016-016066, 17H06104, 16H02224, and 7K05664
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