A quantitative study on the seasonal polar motion excitated by the atmosphe
ric angular momentum (MM) and the oceanic angular momentum (OAM) has been c
arried out using numerical models. The results show that for the prograde a
nd retrograde components of the seasonal polar motion (the annual polar mot
ion and the semiannual polar motion), the sum of excitations by both the AA
M and the OAM is closer to the observed results rather than that of the AAM
only. This reflects a significant contribution of the OAM to the seasonal
polar motion.