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A quantitative study on the seasonal polar motion excitated by the atmospheric angular momentum (AAM) and the oceanic angular momentum (OAM) has been carried out using numerical models. The results show that for the prograde and retrograde components of the seasonal polar motion (the annual polar motion and the semiannual polar motion), the sum of excitations by both the AAM and the 0AM is closer to the observed results rather than that of the AAM only. This reflects a significant contribution of the 0AM to the seasonal polar motion.
A quantitative study on the seasonal polar motion excitated by the atmospheric angular momentum (AAM) and the oceanic angular momentum (OAM) has been carried out using using models. The results show that for the prograde and retrograde components of the seasonal polar motion (the annual polar motion and the semiannual polar motion), the sum of excitations by both the AAM and the 0AM is closer to the observed results rather than that of the AAM only. This reflects a significant contribution of the 0AM to the seasonal polar motion.