Glacial Isostatic Adjustment SimulationOur Glacial Isostatic Adjustment simulation demonstrates results from work published in Geophysical Research Letters, "GIA Model Statistics for GRACE Hydrology, Cryosphere and Ocean Science".
This model quantifies the impact of Antarctica and Greenland melt on the coastlines of several states in the US assuming the so-called bath-tub model (sea level is evenly distributed over the entire oceans as though Earth is a nongravitating, nonrotating, rigid planet).
Melting ice in Antarctica and Greenland can change the mass and volume of ocean water, affecting sea levels on U.S. coastlines.
Gradient fingerprint mapping of local sea level with respect to ice thickness changes over all glaciated areas of the world.
Melting ice can change the gravitational profile of Earth's surface, with counter-intuitive effects: lower sea levels close to the melting mass, and higher levels farther away.
Present-day GIA trends (gravity, uplift and geoid). Statistics (expectation and standard deviation) were derived from a Bayesian ensemble of 100,000 models constrained by a global data set of relative sea level and GPS data.
Earth's crust is rebounding slowly, over thousands of years, from the heavy burden of the last ice age. This simulation allows mapping of these trends across Earth's surface with the help of planet-wide GPS and sea level data, along with an ensemble of 100,000 computer models.