initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6
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 initia...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20190025787 2023-05-15T13:33:01+02:00 initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6 Goelzer, Heiko Cornford, Stephen Sutter, Johannes Larour, Eric Zhang, Tong Reerink, Thomas J. Golledge, Nicholas R. Morlighem, Mathieu Pattyn, Frank Simon, Erika Kleiner, Thomas Dumas, Christophe Lipscomb, William H. Hoffman, Matthew J. Schlegel, Nicole-Jeanne Mengel, Matthias Rodehacke, Christian B. Payne, Anthony J. Greve, Ralf Sun, Sainan Gregory, Jonathan M. Gillet-Chaulet, Fabien Wal, Roderik S. W. van de Shepherd, Andrew Abe-Ouchi, Ayako Seroussi, Helene Breedam, Jonas Van Pollard, David Price, Stephen F. Leguy, Gunter Huybrechts, Philippe Reese, Ronja Lowry, Daniel Brondex, Julien Nowicki, Sophie Humbert, Angelika Quiquet, Aurélien Winkelmann, Ricarda Albrecht, Torsten Unclassified, Unlimited, Publicly available May 14, 2019 application/pdf http://hdl.handle.net/2060/20190025787 unknown Document ID: 20190025787 http://hdl.handle.net/2060/20190025787 Copyright, Use by or on behalf of the U.S. Government permitted CASI Geosciences (General) GSFC-E-DAA-TN69340 The Cryosphere (ISSN 1994-0416) (e-ISSN 1994-0424); 13; 5; 1441-1471 2019 ftnasantrs 2019-07-21T12:30:14Z 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. Other/Unknown Material Antarc* Antarctic Antarctica Greenland Ice Sheet Ice Shelves NASA Technical Reports Server (NTRS) Antarctic Greenland The Antarctic |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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unknown |
topic |
Geosciences (General) |
spellingShingle |
Geosciences (General) Goelzer, Heiko Cornford, Stephen Sutter, Johannes Larour, Eric Zhang, Tong Reerink, Thomas J. Golledge, Nicholas R. Morlighem, Mathieu Pattyn, Frank Simon, Erika Kleiner, Thomas Dumas, Christophe Lipscomb, William H. Hoffman, Matthew J. Schlegel, Nicole-Jeanne Mengel, Matthias Rodehacke, Christian B. Payne, Anthony J. Greve, Ralf Sun, Sainan Gregory, Jonathan M. Gillet-Chaulet, Fabien Wal, Roderik S. W. van de Shepherd, Andrew Abe-Ouchi, Ayako Seroussi, Helene Breedam, Jonas Van Pollard, David Price, Stephen F. Leguy, Gunter Huybrechts, Philippe Reese, Ronja Lowry, Daniel Brondex, Julien Nowicki, Sophie Humbert, Angelika Quiquet, Aurélien Winkelmann, Ricarda Albrecht, Torsten initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6 |
topic_facet |
Geosciences (General) |
description |
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. |
format |
Other/Unknown Material |
author |
Goelzer, Heiko Cornford, Stephen Sutter, Johannes Larour, Eric Zhang, Tong Reerink, Thomas J. Golledge, Nicholas R. Morlighem, Mathieu Pattyn, Frank Simon, Erika Kleiner, Thomas Dumas, Christophe Lipscomb, William H. Hoffman, Matthew J. Schlegel, Nicole-Jeanne Mengel, Matthias Rodehacke, Christian B. Payne, Anthony J. Greve, Ralf Sun, Sainan Gregory, Jonathan M. Gillet-Chaulet, Fabien Wal, Roderik S. W. van de Shepherd, Andrew Abe-Ouchi, Ayako Seroussi, Helene Breedam, Jonas Van Pollard, David Price, Stephen F. Leguy, Gunter Huybrechts, Philippe Reese, Ronja Lowry, Daniel Brondex, Julien Nowicki, Sophie Humbert, Angelika Quiquet, Aurélien Winkelmann, Ricarda Albrecht, Torsten |
author_facet |
Goelzer, Heiko Cornford, Stephen Sutter, Johannes Larour, Eric Zhang, Tong Reerink, Thomas J. Golledge, Nicholas R. Morlighem, Mathieu Pattyn, Frank Simon, Erika Kleiner, Thomas Dumas, Christophe Lipscomb, William H. Hoffman, Matthew J. Schlegel, Nicole-Jeanne Mengel, Matthias Rodehacke, Christian B. Payne, Anthony J. Greve, Ralf Sun, Sainan Gregory, Jonathan M. Gillet-Chaulet, Fabien Wal, Roderik S. W. van de Shepherd, Andrew Abe-Ouchi, Ayako Seroussi, Helene Breedam, Jonas Van Pollard, David Price, Stephen F. Leguy, Gunter Huybrechts, Philippe Reese, Ronja Lowry, Daniel Brondex, Julien Nowicki, Sophie Humbert, Angelika Quiquet, Aurélien Winkelmann, Ricarda Albrecht, Torsten |
author_sort |
Goelzer, Heiko |
title |
initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6 |
title_short |
initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6 |
title_full |
initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6 |
title_fullStr |
initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6 |
title_full_unstemmed |
initMIP-Antarctica: an Ice Sheet Model Initialization Experiment of ISMIP6 |
title_sort |
initmip-antarctica: an ice sheet model initialization experiment of ismip6 |
publishDate |
2019 |
url |
http://hdl.handle.net/2060/20190025787 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Antarctica Greenland Ice Sheet Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctica Greenland Ice Sheet Ice Shelves |
op_source |
CASI |
op_relation |
Document ID: 20190025787 http://hdl.handle.net/2060/20190025787 |
op_rights |
Copyright, Use by or on behalf of the U.S. Government permitted |
_version_ |
1766037874482872320 |