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Searise Experiment Revisited: Sources of Spread in Multi-model Projections of the Greenland Ice-sheet : Volume 9, Issue 1 (27/02/2015)

By Saito, F.

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Book Id: WPLBN0004023164
Format Type: PDF Article :
File Size: Pages 42
Reproduction Date: 2015

Title: Searise Experiment Revisited: Sources of Spread in Multi-model Projections of the Greenland Ice-sheet : Volume 9, Issue 1 (27/02/2015)  
Author: Saito, F.
Volume: Vol. 9, Issue 1
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Blatter, H., Takahashi, K., Abe-Ouchi, A., & Saito, F. (2015). Searise Experiment Revisited: Sources of Spread in Multi-model Projections of the Greenland Ice-sheet : Volume 9, Issue 1 (27/02/2015). Retrieved from

Description: Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan. The present paper revisits the future surface-climate experiments of the Greenland ice-sheet proposed by the Sea-level Response to Ice Sheet Evolution (SeaRISE, Bindschadler et al., 2013) study. The projections of the different SeaRISE participants show diversion, which has not been examined in detail to date. A series of sensitivity experiments are conducted and analyzed using the Ice-sheet model for Integrated Earth-system Studies (IcIES) by replacing one or more formulations of the model parameters with those adopted in other model(s). The results show that the main sources of the diversion between the projections of the different SeaRISE participants are differences in the initialization methods and in the surface mass balance methods, and both aspects have almost equal impact on the results. Treatment of ice-sheet margins in the simulation has a secondary impact on the diversion. We conclude that spinning-up the model using fixed topography through the spin-up period while the temperature is allowed to evolve according to the surface temperature history is the preferred representation at least for the experiment configuration examined in the present paper. A benchmark model experiment set-up that most of the numerical model can perform is proposed for future intercomparison projects, in order to evaluate the uncertainties relating to pure ice-sheet model flow characteristics.

SeaRISE experiment revisited: sources of spread in multi-model projections of the Greenland ice-sheet

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