The redistribution of fluid mass across the Earth’s surface and near-surface can cause load-induced deformation across a wide range of temporal and spatial scales. Present-day water cycle dynamics drive instantaneous elastic responses of the Earth’s crust termed Hydrological Loading (HL). Viscoelastic deformation due to long-term changes in ice sheets occurs time-delayed as Glacial Isostatic Adjustment (GIA). Both processes lead to observable deformation at the Earth’s surface and influence gravity, rotation, and stress state.
Recent advancements in the accuracy and availability of space geodetic measurement techniques (e.g., GNSS, InSAR, satellite gravimetry, satellite altimetry) and improved geophysical models have significantly enhanced our understanding of solid-Earth deformation in response to mass loading. These observations, coupled with refined geophysical models, offer new insights into hydrological processes, (de-)glaciation history, sea-level changes, and Earth's rheology.
This session hosts research that advances our ability to accurately quantify and/or improve the modeling of GIA or HL-related mass changes across different temporal and spatial scales. HL studies may involve various hydrological compartments (e.g., soil moisture groundwater, surface water, snow, ice). GIA studies including sea-level changes and the Earth's response to past and current ice-mass changes are also welcome. We further invite studies focusing on innovative measurement, complex modeling approaches, and reconciling observations from different geodetic measurement techniques. We seek studies that conduct intercomparisons of different model data and geodetic measurement techniques to understand their relative strengths, weaknesses, and accuracies. Further, research that proposes strategies for seamless and accurate integration is highly encouraged. This session is co-sponsored by the SCAR sub-committee INSTANT-EIS (https://www.scar.org/science/instant/home/) and the IAG/IACS sub-commission 3.4 “Cryospheric Deformation”.
Measuring and modelling solid-Earth deformation induced by changing loads from liquid and frozen water
Co-organized by HS13, co-sponsored by
SCAR and IACS
Convener:
Mohammad J. Tourian
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Co-conveners:
Matthias O. WillenECSECS,
Joëlle Nicolas,
Makan KaregarECSECS,
Francesca Silverii,
Holger Steffen,
Caroline van CalcarECSECS