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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

References

Buffa, F., Fadda, A., Orrú, N., & Silvano, R. 1999, Studio dell’Idrologia Superficiale della Sardegna, Ente Autonomo del Flumendosa.Google Scholar
Fairbridge, R.W. 1991, Planetary and geology, in New Approaches in Geomagnetism and the Earths Rotation, Flodmak, S., World Scientific.Google Scholar
Frède, V. & Mazzega, P. 1999, Fluctuation of the Earth rotation and El Niño events, IERS Technical Note 26, 37.Google Scholar
Gipson, J.M. & Ma, C. 1999, Signature of El Niño in the length of day as measured by VLBI, IERS Technical Note 26, 17.Google Scholar
Hurrel, J.W. 1996, Geophys. Res. Lett, 665, 23.Google Scholar
Huang, J., Higuchi, K., & Shamar, A. 1998, Geophys. Res. Lett., 2707, 25.Google Scholar
Jordi, C., Morrison, L.V., Rosen, R.D., Salstein, D.A., & Russell, G. 1994, Geophys. J. Int., 811, 117.Google Scholar
Kołaczek, B., Nuzhdina, M., Nastula, J., & Kosek, W. 1999, El Niño impact on atmospheric and geodetic excitations of polar motion, IERS Technical Note 26, 23.Google Scholar
Onorato, M., Salvatti, M.V., Buresti, G. & Petagna, P. 1996, Analysis of DNS velocity signals in a coaxial jet configuration, Atti Dipartimento di Ingegneria Aerospaziale, University of Pisa.Google Scholar