These datasets contain the ice sheet model simulation from the ABUMIP (Antarctic BUttressing Model Intercomparison Project) effort. ABUMIP aims at comparing model responses to complete loss of buttressing by investigating the end-member of ice-shelf buttressing, i.e., the total loss of ice shelves. This enables gauging the sensitivity of different ice sheet models with respect to grounding-line retreat, as a function of basal sliding, isostasy, and other model parameters.

The experiments are kept simple and build on existing InitMIP-Antarctica experiments (Seroussi et al. 2019) within the framework of ISMIP6 (Nowicki et al., 2016, 2020). See here for the protocol, participating models and requested model output data. Results of ABUMIP have been published in Sun et al. (2020). Key characteristics of participating models are found in the table below (Table 1 of Sun et al. (2020)).

Downloading Data
The data can be downloaded from the Globus GHub-ISMIP6-ABUMIP endpoint. Please log in and click on the Download tab to receive the Download instructions.
Acknowledgements
The experimental protocol and datasets for the ISMIP6-ABUMIP standalone ice sheet simulations would not have been possible without the effort of many scientists that have given their time and expertise. ISMIP6 would like to thank the ABUMIP leadership: Frank Pattyn, Nick Golledge and Sainan Sun. Finally, we thank the ISMIP6 ice sheet modelers for their feedback on the design of the protocol and their willingness to participate in ISMIP6.
Terms of use and citation requirements
To enable modeling groups and others who support CMIP6 and ISMIP6 to demonstrate its impact (and secure ongoing funding), you are required to cite and acknowledge those who have made CMIP6 and ISMIP6 possible. Please read and adhere to the CMIP6 and ISMIP6 Terms of Use.
Credits
We thank the Climate and Cryosphere (CliC) effort, which provided support for ISMIP6 through sponsoring of workshops, hosting the ISMIP6 website and wiki, and promoted ISMIP6. We acknowledge the World Climate Research Programme, which, through its Working Group on Coupled Modelling, coordinated and promoted CMIP5 and CMIP6. We thank the climate modeling groups for producing and making available their model output, the Earth System Grid Federation (ESGF) for archiving the CMIP data and providing access, the University at Buffalo for ISMIP6 data distribution and upload, and the multiple funding agencies who support individual ice sheet modelers, CMIP5 and CMIP6 and ESGF. We thank the ISMIP6 steering committee, the ISMIP6 model selection group and ISMIP6 dataset preparation group for their continuous engagement in defining ISMIP6.
References
Nowicki, S., A. Payne, E. Larour, H. Seroussi, H. Goelzer, W. Lipscomb, J. Gregory, A. Abe Ouchi, and A. Shepherd, 2016. Ice sheet modeling intercomparison project (ISMIP6) contribution to CMIP6. Geoscientific Model Development, 9, 4521-4545, https://doi.org/10.5194/gmd-9-4521-2016.
Nowicki, S. H. Goelzer, H. Seroussi, A. Payne, W., Lipscomb, A., Abe-Ouchi, C. Agosta, P. Alexander, X. Asay-Davis, A. Barthel, T. Bracegirdle, R. Cullather, D. Felikson, X. Fettweis, J. Gregory, T. Hattermann, N. Jourdain, P. Kuipers Munneke, E. Larour, C. Little, M. Morlighem, I. Nias, A. Shepherd, E. Simon, D. Slater, R. Smith, F. Straneo, L. Trusel, M. van den Broeke, and R. van de Wal, R., 2020. Experimental protocol for sea level projections from ISMIP6 stand-alone ice sheet models, The Cryosphere, 14, 2331–2368, https://doi.org/10.5194/tc-14-2331-2020.
Seroussi, H., S. Nowicki, E. Simon, A. Abe Ouchi, T. Albrecht, J. Brondex, S. Cornford, C. Dumas, F. Gillet-Chaulet, H. Goelzer, N. Golledge, J. Gregory, R. Greve, M. Hoffman, A. Humbert, P. Huybrechts, T. Kleiner, E. Larour, G. Leguy, W. Lipscomb, D. Lowry, M. Mengel, M. Morlighem, F. Pattyn, A. Payne, D. Pollard, S. Price, A. Quiquet, T. Reerink, R. Reese, C. Rodehacke, N. Schlegel, A. Shepherd, S. Sun, J. Sutter, J. Van Breedam, R. van de Wal, R. Winkelmann and T. Zhang, 2019. initMIP-Antarctica: An ice sheet model initialization experiment of ISMIP6, The Cryosphere, 13(5), 1441-1471, doi:10.5194/tc-13-1441-2019.
Publications
Sun S., F. Pattyn, E. Simon, T. Albrecht, S. Cornford, R. Calov, C. Dumas, F. Gillet-Chaulet, H. Goelzer, N. Golledge, R. Greve, M. Hoffman, A. Humbert, E. Kazmierczak, T. Kleiner, G. Leguy, W. Lipscomb, D. Martin, M. Morlighem, S. Nowicki, D. Pollard, S. Price, A. Quiquet, H. Seroussi, T. Schlemm, J. Sutter, R. van de Wal, R. Winkelmann, and T. Zhang, 2020. Antarctic ice sheet response to sudden and sustained ice shelf collapse (ABUMIP), 1-4, Journal of Glaciology, https://doi.org/10.1017/jog.2020.67