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Project: Origins of Southern Hemispheric Geoid Change
State: California
Sponsoring Program: Solid Earth & Natural Hazards99
Affiliation: Jet Propulsion Laboratory
Principal Investigator: Ivins, Erik
Description: Provide analysis, predictions and
evaluation of the geoid of the Southern Hemisphere (south of 45
degrees latitude) with special attention to the time variabiliattention
to the time variability associated with mantle rebound and ongoing
changes in the cryosphere.
Strategic Importance:
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Improve our understanding of mantle/lithospheric rheology and
dynamics beneath the Antarctic crust.
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Determine the impact of postglacial rebound on height and geoid
change measurements from future space missions.
- Evaluate
the time-variable geoid change caused by present-day ice mass
balance.
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Evaluate the direct gravitational effect of both rebound and present-day
ice mass variability on Southern Hemispheric sea level change.
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Gain new insight into the links between past ice and climate changes
and ongoing viscous rebound of the mantle.
Anticipated Benefits:
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Potential to optimize the use future altimetry and gravity observations
for determining the stability of the Antarctic ice sheet in the
light of present-day and future climate change.
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Isolate the components of TOPEX/POSEIDON and JASON-1 satellite
altimetry data indicating sea level change that may owe their
origins to postglacial rebound in Antarctica.
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