The period and quality factor of the Chandler wobble(CW)are useful for constraining the Earth's internal structure properties,such as the mantle elasticity.It has been shown that the CW is mainly excited by a combination of atmospheric and oceanic processes;hence based on a deconvolution method,we can remove them from the excitation sequence of the CW to estimate its period P and quality factor Q.We finally re-estimate P=432.3±0.8 days and Q=85±15 for the CW.Based on those two estimates,we investigate the relationship between the geomagnetic jerks and the excitation sequences of the CW.The geomagnetic jerks or jerk bounds are well consistent with the sudden changes of the excitation se-quences of the CW.This demonstrates that the geomagnetic jerks could be a possible excitation source of the CW.It is crucial for understanding the excitation of the CW and for deeper geophysical insights into the geomagnetic jerks.

Yachong An;Hao Ding

Department of Geophysics,School of Geodesy and Geomatics,Key Laboratory of Geospace Environment and Geodesy of the Ministry of Education,Wuhan University,430079 Wuhan,China;Hubei LuoJia Laboratory,430079 Wuhan,China

大地测量与地球动力学（英文版）

[1]Yachong An;Hao Ding-.Revisiting the period and quality factor of the Chandler wobble and its possible geomagnetic jerk excitation)[J].大地测量与地球动力学（英文版）,2022(05):427-434

jerks

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