Variability of polar motion oscillations with periods from 20 to 150 days in 1979 1991

Details Variability of polar motion oscillations with periods from 20 to 150 days in 1979 1991 Variability of polar motion oscillations with periods from 20 to 150 days in 1979 1991

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995bgeod..69..308k&link_type=abstract

Bulletin Géodésique, Volume 69, Issue 4, pp.308-319

Statistics

Computation

2

Scientific paper

Variability of short period oscillations of polar motion with periods ranging from 20 to 150 days were investigated in the period 1979 1991. The new computation method of time variable band pass filter spectra and the Wavelet Transform method were applied. These oscillations are elliptical with variable amplitudes. Modulation periods of amplitude variations of these oscillations of about two and three years were found. Correlations of short period oscillations of polar motion and of effective atmospheric angular momentum (EAAM) excitation functions show annual variations and connections of their increases with El Niño phenomena.

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