Abstract
Recent theoretical simulations on the glacial isostatic adjustment (GIA) have revealed that the model differences arising from considering mantle compressibility are not necessarily negligible if compared with the observation accuracy of present-day deformation rates. In this study, a compressible model is constructed for the GIA in southeast Alaska, and the uplift rate is compared with GPS data and the incompressible case for the first time. It is shown that, for Maxwell rheology, the incompressible model potentially underestimates the mean uplift rate by approximately 27% (4mm/yr) with respect to the compressible case and the difference is detectable given observational precision. This difference between the compressible and incompressible models is reduced to 10% by matching the flexural rigidity of both earth models. When carrying out an inversion using incompressible models, this adjustment is important to infer a physically more correct viscoelastic structure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
