Abstract
In order to study the Earth's rotational dynamics, the dynamic Earth system model DyMEG has been developed. It is driven by time series of consistent atmospheric and oceanic angular momenta. Forced variations of Earth rotation due to the excitations yield an effect on the free polar motion, as rotational deformations of the solid Earth are considered in DyMEG. Analyses of the resulting time series for polar motion show that the Chandler wobble of the model is excited by the atmospheric and oceanic angular momentum variations over more than two decades. The noise of the excitation series is found to contain sufficient energy to counteract the damping of the Chandler amplitude which is caused by friction. It is assumed that the noise is due to stochastic processes within the atmosphere (weather).
| Translated title of the contribution | The System of Chandler-Schwingung |
|---|---|
| Original language | German |
| Pages (from-to) | 166-173 |
| Number of pages | 8 |
| Journal | ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement |
| Volume | 130 |
| Issue number | 3 |
| State | Published - 2005 |
| Externally published | Yes |