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On the Chandler periodicity (Polar Motion, LOD and Climate)

Published online by Cambridge University Press:  12 April 2016

F. Buffa  and
A. Poma
F. Buffa
Affiliation:
Stazione Astronomica di Cagliari, 09012 Capoterra (Cagliari), Italy
A. Poma
Affiliation:
Stazione Astronomica di Cagliari, 09012 Capoterra (Cagliari), Italy

Abstract

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The 14-month Chandler period is associated with the free nutation of the Earth about its spin axis. The observed value of the Chandler period comes usually from the analysis of astronomical series of polar motion data as well as from superconducting gravimeter measurements. At the observation level a periodicity of about 420–440 days also was noticed in microseismic activities. Recently we found evidence of a signal with period similar to the Chandler one in the Sardinia rainfall time series.

Type
Part 5. Chandler and Annual Polar Motion: Observations and Excitation
Information
International Astronomical Union Colloquium , Volume 178: Polar Motion: Historical and Scientific Problems , 2000 , pp. 397 - 402
Copyright
Copyright © Astronomical Society of the Pacific 2000

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