HR: 1330h
AN: G22B-0307    [PDF]
TI: Excitation of the Chandler wobble by varibale annual oscillation of polar motion
AU: * Kosek, W
EM: kosek@cbk.waw.pl
AF: Space Research Centre, Polish Academy of Sciences, Bartycka 18A, Warsaw, 00-716 Poland
AB: Analysis of the IERS pole coordinates data in polar coordinate system shows energetic oscillation with a period of 6-7 years in polar motion radius and velocity. This 6-7 years oscillation is a beat period of the Chandler and annul oscillations and it is variable mostly due to variable phase of the annual oscillation of polar motion. It has been found that the increase of the annual oscillation phase is associated with the increase of the envelope of the Chandler oscillation. This may suggest that the Chandler wobble may be excited by the variable annual oscillation of polar motion which is excited by the atmospheric and oceanic angular momentum. Some correlations of this beat period and the annual oscillation phase/amplitude with Nino indices were also detected.
DE: 1239 Rotational variations
DE: 3339 Ocean/atmosphere interactions (0312, 4504)
SC: Geodesy [G]
MN: 2003 Fall Meeting