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

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Title: Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison
Authors: Goelzer, Heiko Browse this author
Nowicki, Sophie Browse this author
Edwards, Tamsin Browse this author
Beckley, Matthew Browse this author
Abe-Ouchi, Ayako Browse this author
Aschwanden, Andy Browse this author
Calov, Reinhard Browse this author
Gagliardini, Olivier Browse this author
Gillet-Chaulet, Fabien Browse this author
Golledge, Nicholas R. Browse this author
Gregory, Jonathan Browse this author
Greve, Ralf Browse this author →KAKEN DB
Humbert, Angelika Browse this author
Huybrechts, Philippe Browse this author
Kennedy, Joseph H. Browse this author
Larour, Eric Browse this author
Lipscomb, William H. Browse this author
Le clec'h, Sébastien Browse this author
Lee, Victoria Browse this author
Morlighem, Mathieu Browse this author
Pattyn, Frank Browse this author
Payne, Antony J. Browse this author
Rodehacke, Christian Browse this author
Rückamp, Martin Browse this author
Saito, Fuyuki Browse this author
Schlegel, Nicole Browse this author
Seroussi, Helene Browse this author
Shepherd, Andrew Browse this author
Sun, Sainan Browse this author
van de Wal, Roderik Browse this author
Ziemen, Florian A. Browse this author
Keywords: Glacier and Ice Sheet Research
Issue Date: 19-Apr-2018
Journal Title: The Cryosphere
Volume: 12
Issue: 4
Start Page: 1433
End Page: 1460
Publisher 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 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.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Greve Ralf

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