Excitation of the Earth's rotational axis by recent glacial discharges

P. Gasperini, R. Sabadini, D. A. Yuen

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We study the effects of present‐day glacial discharges and the growth of the Antarctic ice sheet on exciting the Earth' rotational axis. Glacial forcing could cause a maximum change in J2 of about one‐third of the observed amount, for the Maxwell rheology and for Burgers’ body models with a long‐term, lower‐mantle viscosity greater than about 1023P. For transient rheologies the amount of excitation due to glacial melting decreases. Polar wander is not much excited by recent glacial melting for the various types of rheologies examined.

Original languageEnglish (US)
Pages (from-to)533-536
Number of pages4
JournalGeophysical Research Letters
Volume13
Issue number6
DOIs
StatePublished - Jun 1986

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