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《PROGRESS IN GEOPHYSICS》 1999-02
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ON WESTW ARD DRIFT OF THE EARTH'S MAGNETIC FIELD

Xu Wen--yao ;Wei Zi--gang(Institute of Geophysics, Chinese Academy of Science,Beigng 100101 )  
The westward drift is one or the most important features in the main magnetic field orthe Earth. Any theory about the geomagnetic field origin should plausibly explain this feature. In this paper we briefly reviewed the history of researches on the westWard drift. Acomparative analysis is given on calculation methods of the westward drift. Then we discussed the physical background and charaCteristics of each method. A new scheme is proposed for separating the drift part and deformation part in the secular variation of the maingeomagnetic field.
【Fund】: 国家自然科学基金!49734140
【CateGory Index】: P318.21
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