Seasonal oscillations in length-of-day: Paper presented at the XXI General Assembly European Geophysical Society The Hague, The Netherlands 6-10 May, 1996

Joachim Höpfner
Variations of annual and semiannual oscillations in rotation parameters have been investigated on the basis of length-of-day (LOD) as well as atmospheric-angular-momemtum (AAM) time series. These oscillations were deter- mined using band-pass filters. In order to show the character of variations of seasonal oscillations, amplitudes, phases and periods were computed by a least-squares adjustment with the method of modified harmonic analysis at quarterly intervals. In addition, the seasonal imbalances in LOD and AAM budgets were...
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