期刊
JOURNAL OF CLIMATE
卷 31, 期 10, 页码 4041-4054出版社
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI-D-17-0352.1
关键词
Antarctica; Ice sheets; Climate change; Ice thickness; Coupled models
资金
- National Science and Engineering Research Council
- Canada Research Chairs Program
- Canadian Foundation for Innovation
- McGill University
- National Aeronautics and Space Administration [NNX17AE17G]
- National Science Foundation [OCE-1202632, ANT-1341394]
- Office of Polar Programs (OPP)
- Directorate For Geosciences [1341394] Funding Source: National Science Foundation
A gravitationally self-consistent, global sea level model with 3D viscoelastic Earth structure is interactively coupled to a 3D dynamic ice sheet model, and the coupled model is applied to simulate the evolution of ice cover, sea level changes, and solid Earth deformation over the last deglaciation, from 40 ka to the modern. The results show that incorporating lateral variations in Earth's structure across Antarctica yields local differences in the modeled ice history and introduces significant uncertainty in estimates of both relative sea level change and modern crustal motions through the last deglaciation. An analysis indicates that the contribution of glacial isostatic adjustment to modern records of sea level change and solid Earth deformation in regions of Antarctica underlain by low mantle viscosity may be more sensitive to ice loading during the late Holocene than across the last deglaciation.
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