摘要
The polar motion excited by the fluctuation of global atmospheric angular momentum (AAM) is investigated. Based on the global AAM data, numerical results demonstrate that the fluctuation of AAM can excite the seasonal wobbles (e.g., the 18-month wobble) and the Chandler wobble, which agree well with previous studies. In addition, by filtering the dominant low frequency components, some distinct polar wobbles corresponding to some great diurnal and semi-diurnal atmospheric tides are found.
The polar motion excited by the fluctuation of global atmospheric angular momentum （AAM） is investigated. Based on the global AAM data, numerical results demonstrate that the fluctuation of AAM can excite the seasonal wobbles （e.g., the 18-month wobble） and the Chandler wobble, which agree well with previous studies. In addition, by filtering the dominant low frequency components, some distinct polar wobbles corresponding to some great diurnal and semi-diurnal atmospheric tides are found.
基金
Supported by the Special Project Fund of State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing(China)
the Ph.D.Candidates Self-research(including1+4)Program of Wuhan Unversity in2008(No.49)
the Engagement Fund of Outstanding Doctoral Dissertation of Wuhan University(No.22)
the Open Fund of Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,China(No.08-02-02)
