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initMIP-Antarctica: an ice sheet model initialization experiment of ISMIP6

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Title: initMIP-Antarctica: an ice sheet model initialization experiment of ISMIP6
Authors: Seroussi, Hélène Browse this author
Nowicki, Sophie Browse this author
Simon, Erika Browse this author
Abe-Ouchi, Ayako Browse this author
Albrecht, Torsten Browse this author
Brondex, Julien Browse this author
Cornford, Stephen Browse this author
Dumas, Christophe Browse this author
Gillet-Chaulet, Fabien Browse this author
Goelzer, Heiko Browse this author
Golledge, Nicholas R Browse this author
Gregory, Jonathan M Browse this author
Greve, Ralf Browse this author →KAKEN DB
Hoffman, Matthew J Browse this author
Humbert, Angelika Browse this author
Huybrechts, Philippe Browse this author
Kleiner, Thomas Browse this author
Larour, Eric Browse this author
Leguy, Gunter Browse this author
Lipscomb, William H Browse this author
Lowry, Daniel Browse this author
Mengel, Matthias Browse this author
Morlighem, Mathieu Browse this author
Pattyn, Frank Browse this author
Payne, Anthony J Browse this author
Pollard, David Browse this author
Price, Stephen F Browse this author
Quiquet, Aurélien Browse this author
Reerink, Thomas J Browse this author
Reese, Ronja Browse this author
Rodehacke, Christian B Browse this author
Schlegel, Nicole-Jeanne Browse this author
Shepherd, Andrew Browse this author
Sun, Sainan Browse this author
Sutter, Johannes Browse this author
Van Breedam, Jonas Browse this author
van de Wal, Roderik S. W Browse this author
Winkelmann, Ricarda Browse this author
Zhang, Tong Browse this author
Issue Date: 14-May-2019
Publisher: Copernicus Publications on behalf of the European Geosciences Union
Journal Title: The Cryosphere
Volume: 13
Issue: 5
Start Page: 1441
End Page: 1471
Publisher DOI: 10.5194/tc-13-1441-2019
Abstract: Ice sheet numerical modeling is an important tool to estimate the dynamic contribution of the Antarctic ice sheet to sea level rise over the coming centuries. The influence of initial conditions on ice sheet model simulations, however, is still unclear. To better understand this influence, an initial state intercomparison exercise (initMIP) has been developed to compare, evaluate, and improve initialization procedures and estimate their impact on century-scale simulations. initMIP is the first set of experiments of the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6), which is the primary Coupled Model Intercomparison Project Phase 6 (CMIP6) activity focusing on the Greenland and Antarctic ice sheets. Following initMIP-Greenland, initMIP-Antarctica has been designed to explore uncertainties associated with model initialization and spin-up and to evaluate the impact of changes in external forcings. Starting from the state of the Antarctic ice sheet at the end of the initialization procedure, three forward experiments are each run for 100 years: a control run, a run with a surface mass balance anomaly, and a run with a basal melting anomaly beneath floating ice. This study presents the results of initMIP-Antarctica from 25 simulations performed by 16 international modeling groups. The submitted results use different initial conditions and initialization methods, as well as ice flow model parameters and reference external forcings. We find a good agreement among model responses to the surface mass balance anomaly but large variations in responses to the basal melting anomaly. These variations can be attributed to differences in the extent of ice shelves and their upstream tributaries, the numerical treatment of grounding line, and the initial ocean conditions applied, suggesting that ongoing efforts to better represent ice shelves in continental-scale models should continue.
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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