A set of analytical formulae to model deglaciation-induced polar wander

W. Keller, M. Kuhn, W. E. Featherstone

Research output: Chapter in Book/Conference paperConference paper

Abstract

Traditionally, deglaciation-induced polar wander changes are modelled using a saw-tooth-shaped function for the time-history of ice sheets and spherical caps to express their spatial extent. In this contribution we present a set of analytical formulae that allow for a more realistic temporal evolution as well as spatial distribution of current ice masses and the corresponding sea level change when partly or completely melted. Starting with the linearized Liouville equations we develop closed-form time-domain solutions via the Laplace-domain, which are based on the assumption of a piecewise linear time-history of the perturbation of the inertia, which do not require the solution of convolution integrals. As being a central aspect of polar wander modelling we also revisit perturbation of the moment of inertia changes due to arbitrary surface loading due to changes in ice and ocean water masses and compare them with the result of the more simplistic models of spherical ice caps and a uniform sea level change. Finally, the correctness of the developed formulae is checked by various numerical checks based on more simplistic models and numerical integration techniques.

Original languageEnglish
Title of host publicationGeodesy for Planet Earth: Proceedings of the 2009 IAG Symposium
EditorsSteve Kenyon, Maria Christina Pacino, Urs Marti
PublisherSpringer
Pages527-535
Number of pages9
Volume136
ISBN (Electronic)978-3-642-20338-1
ISBN (Print)978-3-642-20337-4
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventIAG Symposium on Geodesy for Planet Earth, IAG 2009 - Chania, Crete, Argentina
Duration: 31 Aug 20094 Sep 2009

Publication series

NameInternational Association of Geodesy Symposia

Conference

ConferenceIAG Symposium on Geodesy for Planet Earth, IAG 2009
CountryArgentina
CityChania, Crete
Period31/08/094/09/09

Fingerprint Dive into the research topics of 'A set of analytical formulae to model deglaciation-induced polar wander'. Together they form a unique fingerprint.

Cite this