G12A:
Glacial Isostasy, Sea Level, and Earth System Evolution I

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Session ID#: 31466

Session Description:
Recent analyses of Ice-Earth-Ocean processes by space geodetic measurements (e.g. GPS, GRACE, and satellite altimetry) has led to a new class of glacial isostatic adjustment (GIA) models. Such space geodetic measurements are dramatically enhancing and complementing the more traditional measurements of GIA provided by tide gauge and geological relative sea-level records. The new GIA models better constrain the space and time dependent variation of continental ice cover during the most recent 100,000 year cycle of the Late Quaternary ice-age; and the depth dependence of the effective viscosity of Earth’s mantle, as well as its lateral heterogeneity. We invite contributions that are focused upon: (1) the development and further improvement of GIA models using instrumental and geological measurements; (2) inferences concerning Earth’s interior visco-elastic structure; and (3) the variations of continental ice cover that have occurred on the surface in response to climate system processes.
Primary Convener:  Benjamin Peter Horton, Asian School of the Environment, Nanyang Technological University, Singapore, Singapore; Rutgers University, Department of Marine and Coastal Sciences, New Brunswick, United States
Convener:  W Richard Peltier, University of Toronto, Physics, Toronto, ON, Canada
Chairs:  Benjamin Peter Horton, City University of Hong Kong, Hong Kong, Hong Kong and W Richard Peltier, University of Toronto, Physics, Toronto, ON, Canada
OSPA Liaison:  Benjamin Peter Horton, City University of Hong Kong, Hong Kong, Hong Kong

Cross-Listed:
  • C - Cryosphere
  • GC - Global Environmental Change
  • OS - Ocean Sciences
  • PP - Paleoceanography and Paleoclimatology
Index Terms:

0726 Ice sheets [CRYOSPHERE]
1243 Space geodetic surveys [GEODESY AND GRAVITY]
1641 Sea level change [GLOBAL CHANGE]
4928 Global climate models [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

Evaluation of 14 global GIA forward models using a novel GPS dataset and GRACE (252977)
Maike Schumacher1, Zhe Sha2, Jonathan Rougier2, Matt A King3, Shfaqat Abbas Khan4, C.K. Shum5, Scott B Luthcke6 and Jonathan L Bamber7, (1)University of Bristol, Bristol Glaciology Center, Bristol, BS8, United Kingdom, (2)University of Bristol, Bristol, United Kingdom, (3)University of Tasmania, Surveying and Spatial Sciences, School of Technology, Environments and Design, Hobart, TAS, Australia, (4)DTU National Space Institute, Geodesy, Kongens Lyngby, Denmark, (5)Ohio State University, School of Earth Sciences, Columbus, OH, United States, (6)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (7)University of Bristol, School of Geographical Sciences, Bristol, United Kingdom
Geophysical insights on the GIA process provided by high-quality constraints from peripheral regions: An outlook on perspectives from North America and from the Mediterranean basin (Invited) (261045)
Keven Roy, Nanyang Technological University, Asian School of the Environment, Singapore, Singapore; University of Toronto, Toronto, ON, Canada and W Richard Peltier, University of Toronto, Physics, Toronto, ON, Canada
Interactions of ice sheet evolution, sea level and GIA in a region of complex Earth structure (298995)
Natalya Gomez1, Ngai Ham Chan1, Konstantin Latychev2, David Pollard3 and Evelyn M Powell4, (1)McGill University, Earth and Planetary Sciences, Montreal, QC, Canada, (2)Harvard University, Department of Earth and Planetary Sciences, Cambridge, NY, United States, (3)Pennsylvania State University, Earth and Environmental Systems Institute, University Park, PA, United States, (4)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States
The Sensitivity of Glacial Isostatic Adjustment in West Antarctica to Lateral Variations in Earth Structure (250034)
Grace A Nield, Durham University, Durham, United Kingdom, Pippa Whitehouse, Durham University, Department of Geography, Durham, United Kingdom, Bas Blank, Delft University of Technology, Delft, Netherlands, Wouter van der Wal, Delft University of Technology, Faculty of Aerospace Engineering, Delft, Netherlands, John Paul O'Donnell, University of Leeds, Leeds, LS2, United Kingdom, Graham William Stuart, University of Leeds, School of Earth and Environment, Leeds, United Kingdom, Andrew Jason Lloyd, Columbia University, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Douglas Wiens, Washington University in St. Louis, Department of Earth, Environmental, and Planetary Science, St. Louis, United States
The Impacts of 3-D Earth Structure on GIA-Induced Crustal Deformation and Future Sea-Level Change in the Antarctic (279315)
Evelyn M Powell, Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States, Carling Hay, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, Konstantin Latychev, Harvard University, Department of Earth and Planetary Sciences, Cambridge, NY, United States, Natalya Gomez, McGill University, Earth and Planetary Sciences, Montreal, QC, Canada and Jerry X Mitrovica, Harvard University, Department of Earth and Planetary Sciences, Cambridge, United States
Glacial Isostatic Adjustment Derived Boundary Conditions for Paleoclimate Simulation: the Refined ICE-6G_D (VM5a) Model and the Dansgaard-Oeschger Oscillation (236277)
W Richard Peltier, University of Toronto, Physics, Toronto, ON, Canada, Guido Vettoretti, University of Toronto, Toronto, ON, Canada and Donald F Argus, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States

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