Excitation of the Earth's rotational axis by recent glacial discharges
作者:
P. Gasperini,
R. Sabadini,
D. A. Yuen,
期刊:
Geophysical Research Letters
(WILEY Available online 1986)
卷期:
Volume 13,
issue 6
页码: 533-536
ISSN:0094-8276
年代: 1986
DOI:10.1029/GL013i006p00533
数据来源: WILEY
摘要:
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 J2of 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
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