35339
2013
2013
eng
410
422
13
215
59
article
International Glaciological Society
Cambridge
1
--
--
--
Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison
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.
Journal of glaciology
10.3189/2013JoG12J129
0022-1430
wos:2011-2013
WOS:000323189600002
Pattyn, F (reprint author), Univ Libre Brussels, Lab Glaciol, Brussels, Belgium., fpattyn@ulb.ac.be
ice2sea project from the European Union 7th Framework Programme
[226375]; NASA Cryospheric Sciences Program; NASA Modeling Analysis and
Prediction Program; NASA
Frank Pattyn
Laura Perichon
Gael Durand
Lionel Favier
Olivier Gagliardini
Richard C. A. Hindmarsh
Thomas Zwinger
Torsten Albrecht
Stephen Cornford
David Docquier
Johannes J. Furst
Daniel Goldberg
Gudmundur Hilmar Gudmundsson
Angelika Humbert
Moritz Huetten
Philippe Huybrechts
Guillaume Jouvet
Thomas Kleiner
Eric Larour
Daniel Martin
Mathieu Morlighem
Anthony J. Payne
David Pollard
Martin Rueckamp
Oleg Rybak
Helene Seroussi
Malte Thoma
Nina Wilkens
Institut für Physik und Astronomie
Referiert
56300
2020
2020
eng
3033
3070
38
9
14
article
Copernicus
Göttingen
1
2020-09-17
2020-09-17
--
ISMIP6 Antarctica
Ice flow models of the Antarctic ice sheet are commonly used to simulate its future evolution in response to different climate scenarios and assess the mass loss that would contribute to future sea level rise. However, there is currently no consensus on estimates of the future mass balance of the ice sheet, primarily because of differences in the representation of physical processes, forcings employed and initial states of ice sheet models. This study presents results from ice flow model simulations from 13 international groups focusing on the evolution of the Antarctic ice sheet during the period 2015-2100 as part of the Ice Sheet Model Intercomparison for CMIP6 (ISMIP6). They are forced with outputs from a subset of models from the Coupled Model Intercomparison Project Phase 5 (CMIP5), representative of the spread in climate model results. Simulations of the Antarctic ice sheet contribution to sea level rise in response to increased warming during this period varies between 7:8 and 30.0 cm of sea level equivalent (SLE) under Representative Concentration Pathway (RCP) 8.5 scenario forcing. These numbers are relative to a control experiment with constant climate conditions and should therefore be added to the mass loss contribution under climate conditions similar to present-day conditions over the same period. The simulated evolution of the West Antarctic ice sheet varies widely among models, with an overall mass loss, up to 18.0 cm SLE, in response to changes in oceanic conditions. East Antarctica mass change varies between 6 :1 and 8.3 cm SLE in the simulations, with a significant increase in surface mass balance outweighing the increased ice discharge under most RCP 8.5 scenario forcings. The inclusion of ice shelf collapse, here assumed to be caused by large amounts of liquid water ponding at the surface of ice shelves, yields an additional simulated mass loss of 28mm compared to simulations without ice shelf collapse. The largest sources of uncertainty come from the climate forcing, the ocean-induced melt rates, the calibration of these melt rates based on oceanic conditions taken outside of ice shelf cavities and the ice sheet dynamic response to these oceanic changes. Results under RCP 2.6 scenario based on two CMIP5 climate models show an additional mass loss of 0 and 3 cm of SLE on average compared to simulations done under present-day conditions for the two CMIP5 forcings used and display limited mass gain in East Antarctica.
The Cryosphere : TC ; an interactive open access journal of the European Geosciences Union
a multi-model ensemble of the Antarctic ice sheet evolution over the 21st century
10.5194/tc-14-3033-2020
1994-0416
1994-0424
outputup:dataSource:WoS:2020
WOS:000572935000001
Seroussi, H (corresponding author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA., helene.seroussi@jpl.nasa.gov
U.S. Department of Energy, Office of Science, the Netherlands Earth; System Science CentreUnited States Department of Energy (DOE); [024.002.001]; Academy of FinlandAcademy of Finland [286587, 322430]; Australian Research CouncilAustralian Research Council [SR140300001]; Agence Nationale de la RechercheFrench National Research Agency; (ANR)European Commission [ANR-15-CE01-0005-01]; European Commission; (TiPACCs grant)European Commission [820575]; Research Foundation -; FlandersFWO; Japan Society for the Promotion of ScienceMinistry of; Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan; Society for the Promotion of Science [JP16H02224, JP17H06104,; JP17H06323]; New Zealand Ministry of Business Innovation and; EmploymentNew Zealand Ministry of Business, Innovation and Employment; (MBIE) [RTVU1705]; German Federal Ministry of Education and; ResearchFederal Ministry of Education & Research (BMBF); Office of Polar; ProgramsNational Science Foundation (NSF)NSF - Directorate for; Geosciences (GEO) [1739031]; National Science FoundationNational Science; Foundation (NSF) [1603799, 1644277, 1852977, 1916566]; National; Aeronautics and Space AdministrationNational Aeronautics & Space; Administration (NASA) [NNX17AG65G, NNX17AI03G]; Deutsche; ForschungsgemeinschaftGerman Research Foundation (DFG) [WI4556/2-1,; WI4556/31]; Norwegian Research CouncilResearch Council of NorwayEuropean; Commission [280727, 295075]; NERCUK Research & Innovation (UKRI)Natural; Environment Research Council (NERC) [cpom30001, ncas10014] Funding; Source: UKRI
Seroussi, Helene
2022-10-14T06:17:48+00:00
sword
importub
filename=package.tar
9202cf7121da193955469317aca6bd63
2393169-3
2411958-1
false
true
CC-BY - Namensnennung 4.0 International
Helene Seroussi
Sophie Nowicki
Antony J. Payne
Heiko Goelzer
William H. Lipscomb
Ayako Abe-Ouchi
Cecile Agosta
Torsten Albrecht
Xylar Asay-Davis
Alice Barthel
Reinhard Calov
Richard Cullather
Christophe Dumas
Benjamin K. Galton-Fenzi
Rupert Gladstone
Nicholas R. Golledge
Jonathan M. Gregory
Ralf Greve
Tore Hattermann
Matthew J. Hoffman
Angelika Humbert
Philippe Huybrechts
Nicolas C. Jourdain
Thomas Kleiner
Eric Larour
Gunter R. Leguy
Daniel P. Lowry
Chistopher M. Little
Mathieu Morlighem
Frank Pattyn
Tyler Pelle
Stephen F. Price
Aurelien Quiquet
Ronja Reese
Nicole-Jeanne Schlegel
Andrew Shepherd
Erika Simon
Robin S. Smith
Fiammetta Straneo
Sainan Sun
Luke D. Trusel
Jonas Van Breedam
Roderik S. W. van de Wal
Ricarda Winkelmann
Chen Zhao
Tong Zhang
Thomas Zwinger
Physik
Institut für Physik und Astronomie
Referiert
Import
Gold Open-Access
34945
2013
2013
eng
1025
1044
20
2
118
article
American Geophysical Union
Washington
1
--
--
--
Insights into spatial sensitivities of ice mass response to environmental change from the SeaRISE ice sheet modeling project II Greenland
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.
Journal of geophysical research : Earth surface
10.1002/jgrf.20076
2169-9003
wos:2011-2013
WOS:000324993900043
Nowicki, S (reprint author), NASA, Goddard Space Flight Ctr, Code 615, Greenbelt, MD 20771 USA., sophie.nowicki@nasa.gov
Japan Society for the Promotion of Science (JSPS) [22244058]; NASA
Cryospheric Sciences Award [NNX11AP39G]; German Federal Ministry of
Education and Research (BMBF); U.S. National Science Foundation
[0531211, 0758274, 0909335, ANT-0424589, 1043018, 25-0550-0001,
OCE-1202632]; Center for Remote Sensing of Ice Sheets (CReSIS)
[0424589]; NASA [NNX-09-AV94G, NNX-10-AI04G]; U.S. Department of Energy
(DOE) Office of Science, Biological and Environmental Research; DOE's
Office of Science [DE-AC02-05CH11231, DE-AC05-00OR22725]; DOE's ASCR;
NASA Postdoctoral Program at the Jet Propulsion Laboratory; NASA
High-End Computing (HEC) Program through the NASA Advanced
Supercomputing (NAS) Division at Ames Research Center; NSF [0909335,
CReSIS 0424589]; Gary Comer Science and Education Foundation; NASA
Cryospheric Science program [281945.02.53.02.19]; NASA Cryospheric
Science program
Sophie Nowicki
Robert A. Bindschadler
Ayako Abe-Ouchi
Andy Aschwanden
Ed Bueler
Hyeungu Choi
Jim Fastook
Glen Granzow
Ralf Greve
Gail Gutowski
Ute Herzfeld
Charles Jackson
Jesse Johnson
Constantine Khroulev
Eric Larour
Anders Levermann
William H. Lipscomb
Maria A. Martin
Mathieu Morlighem
Byron R. Parizek
David Pollard
Stephen F. Price
Diandong Ren
Eric Rignot
Fuyuki Saito
Tatsuru Sato
Hakime Seddik
Helene Seroussi
Kunio Takahashi
Ryan Walker
Wei Li Wang
eng
uncontrolled
Greenland
eng
uncontrolled
ice-sheet
eng
uncontrolled
sea-level
eng
uncontrolled
model
eng
uncontrolled
ensemble
Institut für Physik und Astronomie
Referiert