Articles | Volume 29, issue 1
Nonlin. Processes Geophys., 29, 53–75, 2022
https://doi.org/10.5194/npg-29-53-2022
Nonlin. Processes Geophys., 29, 53–75, 2022
https://doi.org/10.5194/npg-29-53-2022

Research article 17 Feb 2022

Research article | 17 Feb 2022

An approach for constraining mantle viscosities through assimilation of palaeo sea level data into a glacial isostatic adjustment model

Reyko Schachtschneider et al.

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Cited articles

Al-Attar, D. and Tromp, J.: Sensitivity kernels for viscoelastic loading based on adjoint methods, Geophys. J. Int., 196, 34–77, 2014. a
Anderson, B. and Moore, J.: Optimal filtering, Prentice-Hall, Englewood Cliffs, NJ, ISBN 13: 978-0-486-78899-9, 1979. a
Argus, D., Peltier, W., Blewitt, G., and Kreemer, C.: The Viscosity of the Top Third of the Lower Mantle Estimated Using GPS, GRACE, and Relative Sea Level Measurements of Glacial Isostatic Adjustment, J. Geophys. Res.-Sol. Ea., 126, e2020JB021537, https://doi.org/10.1029/2020JB021537, 2021. a
Asch, M., Bocquet, M., and Nodet, M.: Data assimilation: methods, algorithms, and applications, SIAM, ISBN: 978-1-611-97453-9, 2016. a, b
Bagge, M., Klemann, V., Steinberger, B., Latinović, M., and Thomas, M.: Glacial-Isostatic Adjustment Models Using Geodynamically Constrained 3D Earth Structures, Geochem. Geophy. Geosy., 22, e2021GC009853, https://doi.org/10.1029/2021GC009853, 2021. a
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Short summary
Glacial isostatic adjustment is the delayed reaction of the Earth's lithosphere and mantle to changing mass loads of ice sheets or water. The deformation behaviour of the Earth's surface depends on the ability of the Earth's mantle to flow, i.e. its viscosity. It can be estimated from sea level observations, and in our study, we estimate mantle viscosity using sea level observations from the past. This knowledge is essential for understanding current sea level changes due to melting ice.