TY  - JOUR
A1  - Nowicki, Sophie
A1  - Bindschadler, Robert A.
A1  - Abe-Ouchi, Ayako
A1  - Aschwanden, Andy
A1  - Bueler, Ed
A1  - Choi, Hyeungu
A1  - Fastook, Jim
A1  - Granzow, Glen
A1  - Greve, Ralf
A1  - Gutowski, Gail
A1  - Herzfeld, Ute
A1  - Jackson, Charles
A1  - Johnson, Jesse
A1  - Khroulev, Constantine
A1  - Larour, Eric
A1  - Levermann, Anders
A1  - Lipscomb, William H.
A1  - Martin, Maria A.
A1  - Morlighem, Mathieu
A1  - Parizek, Byron R.
A1  - Pollard, David
A1  - Price, Stephen F.
A1  - Ren, Diandong
A1  - Rignot, Eric
A1  - Saito, Fuyuki
A1  - Sato, Tatsuru
A1  - Seddik, Hakime
A1  - Seroussi, Helene
A1  - Takahashi, Kunio
A1  - Walker, Ryan
A1  - Wang, Wei Li
T1  - Insights into spatial sensitivities of ice mass response to environmental change from the SeaRISE ice sheet modeling project II  Greenland
JF  - Journal of geophysical research : Earth surface
N2  - The Sea-level Response to Ice Sheet Evolution (SeaRISE) effort explores the sensitivity of the current generation of ice sheet models to external forcing to gain insight into the potential future contribution to sea level from the Greenland and Antarctic ice sheets. All participating models simulated the ice sheet response to three types of external forcings: a change in oceanic condition, a warmer atmospheric environment, and enhanced basal lubrication. Here an analysis of the spatial response of the Greenland ice sheet is presented, and the impact of model physics and spin-up on the projections is explored. Although the modeled responses are not always homogeneous, consistent spatial trends emerge from the ensemble analysis, indicating distinct vulnerabilities of the Greenland ice sheet. There are clear response patterns associated with each forcing, and a similar mass loss at the full ice sheet scale will result in different mass losses at the regional scale, as well as distinct thickness changes over the ice sheet. All forcings lead to an increased mass loss for the coming centuries, with increased basal lubrication and warmer ocean conditions affecting mainly outlet glaciers, while the impacts of atmospheric forcings affect the whole ice sheet.
KW  - Greenland
KW  - ice-sheet
KW  - sea-level
KW  - model
KW  - ensemble
Y1  - 2013
U6  - https://doi.org/10.1002/jgrf.20076
SN  - 2169-9003
VL  - 118
IS  - 2
SP  - 1025
EP  - 1044
PB  - American Geophysical Union
CY  - Washington
ER  - 
TY  - JOUR
A1  - Pattyn, Frank
A1  - Perichon, Laura
A1  - Durand, Gael
A1  - Favier, Lionel
A1  - Gagliardini, Olivier
A1  - Hindmarsh, Richard C. A.
A1  - Zwinger, Thomas
A1  - Albrecht, Torsten
A1  - Cornford, Stephen
A1  - Docquier, David
A1  - Furst, Johannes J.
A1  - Goldberg, Daniel
A1  - Gudmundsson, Gudmundur Hilmar
A1  - Humbert, Angelika
A1  - Huetten, Moritz
A1  - Huybrechts, Philippe
A1  - Jouvet, Guillaume
A1  - Kleiner, Thomas
A1  - Larour, Eric
A1  - Martin, Daniel
A1  - Morlighem, Mathieu
A1  - Payne, Anthony J.
A1  - Pollard, David
A1  - Rueckamp, Martin
A1  - Rybak, Oleg
A1  - Seroussi, Helene
A1  - Thoma, Malte
A1  - Wilkens, Nina
T1  - Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison
JF  - Journal of glaciology
N2  - Predictions of marine ice-sheet behaviour require models able to simulate grounding-line migration. We present results of an intercomparison experiment for plan-view marine ice-sheet models. Verification is effected by comparison with approximate analytical solutions for flux across the grounding line using simplified geometrical configurations (no lateral variations, no buttressing effects from lateral drag). Perturbation experiments specifying spatial variation in basal sliding parameters permitted the evolution of curved grounding lines, generating buttressing effects. The experiments showed regions of compression and extensional flow across the grounding line, thereby invalidating the boundary layer theory. Steady-state grounding-line positions were found to be dependent on the level of physical model approximation. Resolving grounding lines requires inclusion of membrane stresses, a sufficiently small grid size (<500 m), or subgrid interpolation of the grounding line. The latter still requires nominal grid sizes of <5 km. For larger grid spacings, appropriate parameterizations for ice flux may be imposed at the grounding line, but the short-time transient behaviour is then incorrect and different from models that do not incorporate grounding-line parameterizations. The numerical error associated with predicting grounding-line motion can be reduced significantly below the errors associated with parameter ignorance and uncertainties in future scenarios.
Y1  - 2013
U6  - https://doi.org/10.3189/2013JoG12J129
SN  - 0022-1430
VL  - 59
IS  - 215
SP  - 410
EP  - 422
PB  - International Glaciological Society
CY  - Cambridge
ER  -