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GEORGIA: A Graph Neural Network Based EmulatOR for Glacial Isostatic Adjustment (2023)
Journal Article
Lin, Y., Whitehouse, P. L., Valentine, A. P., & Woodroffe, S. A. (2023). GEORGIA: A Graph Neural Network Based EmulatOR for Glacial Isostatic Adjustment. Geophysical Research Letters, 50(18), https://doi.org/10.1029/2023gl103672

Glacial isostatic adjustment (GIA) modeling is not only useful for understanding past relative sea-level change but also for projecting future sea-level change due to ongoing land deformation. However, GIA model predictions are subject to a range of... Read More about GEORGIA: A Graph Neural Network Based EmulatOR for Glacial Isostatic Adjustment.

Emerging Directions in Geophysical Inversion (2023)
Book Chapter
Valentine, A. P., & Sambridge, M. (2023). Emerging Directions in Geophysical Inversion. In A. Ismail-Zadeh, F. Castelli, D. Jones, & S. Sanchez (Eds.), Applications of Data Assimilation and Inverse Problems in the Earth Sciences (9-26). Cambridge University Press. https://doi.org/10.1017/9781009180412.003

In this chapter, we survey some recent developments in the field of geophysical inversion. We aim to provide an accessible general introduction to the breadth of current research, rather than focussing in depth on particular topics. In particular, we... Read More about Emerging Directions in Geophysical Inversion.

Observations and models of dynamic topography: Current status and future directions (2023)
Book Chapter
Davies, D. R., Ghelichkhan, S., Hoggard, M., Valentine, A. P., & Richards, F. D. (2023). Observations and models of dynamic topography: Current status and future directions. In J. Duarte (Ed.), Dynamics of plate tectonics and mantle convection (223-270). Elsevier. https://doi.org/10.1016/B978-0-323-85733-8.00017-2

The slow creeping motion of Earth’s mantle drives transient changes in surface topography across a variety of spatial and temporal scales. Recent decades have seen substantial progress in understanding this so-called `dynamic topography’, with a grow... Read More about Observations and models of dynamic topography: Current status and future directions.

Overcomplete tomography: a novel approach to imaging (2023)
Journal Article
Turunçtur, B., Valentine, A., & Sambridge, M. (2023). Overcomplete tomography: a novel approach to imaging. RAS Techniques and Instruments, 2(1), 207-215. https://doi.org/10.1093/rasti/rzad010

Regularized least-squares tomography offers a straightforward and efficient imaging method and has seen extensive application across various fields. However, it has a few drawbacks, such as (i) the regularization imposed during the inversion tends to... Read More about Overcomplete tomography: a novel approach to imaging.