A5042237616- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Cryospheric studies and observations
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Seismology and Earthquake Studies
- Geophysics and Gravity Measurements
- Geological and Geochemical Analysis
University of Victoria
2021-2025
Geological Survey of Canada
2024-2025
Natural Resources Canada
2024
North America is experiencing vertical and horizontal crustal motion due to glacial isostatic adjustment (GIA). To explore these motions across central eastern America, GIA modelling was carried out employing the ICE-6G_C surface loading model. The Earth model response determined for 500 3-layered mantle viscosity profiles at nine different lithospheric thicknesses, assuming a constrained density elastic structure. predictions were compared observed velocities downloaded from Nevada Geodetic...
Abstract Normal mode analysis is a Laplace‐transform method for calculating the surface‐loading response of laterally homogeneous spherical Earth models with linear viscoelasticity which delivers modal decay times and amplitudes. It can locally fail owing to numerical singularities arising from viscoelastic parameters, leading an incomplete accounting response. Collocation methods were developed circumvent this issue. The mixed collocation includes least‐squares fitting Laplace‐transformed...
<p>The Coast Mountains in British Columbia and southeastern Alaska contain around 9040 km<sup>2 </sup>of glaciers ice fields at present. While these have followed an overall trend of mass loss since the Little Ice Age (or LIA 300 years before present), past decade has seen a significant increase melting rate that is likely to continue due effects climate change. The region home complex tectonic setting, having proximity Queen Charlotte-Fairweather...
<p>A suite of forward GIA model predictions, spanning a wide range layered mantle viscosity and lithospheric thickness values, is compared to observed horizontal crustal motions in North America discern optimal parameters order minimize root-mean-square (RMS) measure the velocity residuals. To obtain Earth response, combination full normal mode analysis collocation method implemented. It provides means determine surface loading response automatically robustly 1-dimensional...