Stresses, vertical displacement and velocities for model TE60, TE120 and VL20-175 at the LGM (23kyrsBP) and present ...

• Main Author: Vachon, Rémi
• Format: Dataset
• Language: unknown
• Published: DataverseNO 2022
• Subjects: Arctic; Greenland
• Online Access: https://dx.doi.org/10.18710/qbsweh; https://dataverse.no/citation?persistentId=doi:10.18710/QBSWEH

Strong compressive and shear stresses generated by glacial loading and unloading have a direct impact on near-surface geological processes. Glacial stresses are constantly evolving, creating stress perturbations in the lithosphere that extend significant distances away from the ice load. In the Arctic, periodic methane seepage and faulting have been recurrently associated with glacial cycles. However, the evolution of the Arctic glacial stress field and its impact on the upper lithosphere have not been investigated. Here, we compute the evolution in space and time of the glacial stresses induced in the Arctic lithosphere by the North American, Eurasian and Greenland ice sheets during the latest glaciation. We use glacial isostatic adjustment (GIA) methodology to investigate the response of spherical, viscoelastic Earth models with varying lithospheric thickness to the ice loads. The magnitude of the vertical GIA-related stress closely follows the changing ice thickness, whilst the horizontal stresses are ...