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A benchmark study for glacial isostatic adjustment codes
Citation
Spada, G and Barletta, VR and Klemann, V and Riva, REM and Martinec, Z and Gasperini, P and Lund, B and Wolf, D and Vermeersen, LLA and King, MA, A benchmark study for glacial isostatic adjustment codes, Geophysical Journal International, 185, (1) pp. 106-132. ISSN 0956-540X (2011) [Refereed Article]
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Copyright Statement
Copyright 2011 The Authors Geophysical Journal International Copyright 2011 RAS
DOI: doi:10.1111/j.1365-246X.2011.04952.x
Abstract
The study of glacial isostatic adjustment (GIA) is gaining an increasingly important role within
the geophysical community. Understanding the response of the Earth to loading is crucial in
various contexts, ranging from the interpretation of modern satellite geodetic measurements
(e.g. GRACE and GOCE) to the projections of future sea level trends in response to climate
change. Modern modelling approaches to GIA are based on various techniques that range
from purely analytical formulations to fully numerical methods. Despite various teams independently
investigating GIA, we do not have a suitably large set of agreed numerical results
through which the methods may be validated; a community benchmark data set would clearly
be valuable. Following the example of the mantle convection community, here we present, for
the first time, the results of a benchmark study of codes designed to model GIA. This has
taken place within a collaboration facilitated through European Cooperation in Science and
Technology (COST) Action ES0701. The approaches benchmarked are based on significantly
different codes and different techniques. The test computations are based on models with
spherical symmetry and Maxwell rheology and include inputs from different methods and
solution techniques: viscoelastic normal modes, spectral-finite elements and finite elements.
The tests involve the loading and tidal Love numbers and their relaxation spectra, the deformation
and gravity variations driven by surface loads characterized by simple geometry
and time history and the rotational fluctuations in response to glacial unloading. In spite of
the significant differences in the numerical methods employed, the test computations show a
satisfactory agreement between the results provided by the participants.
Item Details
Item Type: | Refereed Article |
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Keywords: | glacial isostatic adjustment, numerical solutions, sea level change, dynamics of lithosphere and mantle, dynamics, gravity and tectonics, mechanics, theory and modelling, rheology, mantle |
Research Division: | Earth Sciences |
Research Group: | Geophysics |
Research Field: | Geodesy |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Understanding climate change |
Objective Field: | Understanding climate change not elsewhere classified |
UTAS Author: | King, MA (Professor Matt King) |
ID Code: | 89663 |
Year Published: | 2011 |
Web of Science® Times Cited: | 75 |
Deposited By: | Geography and Environmental Studies |
Deposited On: | 2014-03-11 |
Last Modified: | 2014-05-08 |
Downloads: | 577 View Download Statistics |
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