单词 | chandler wobble |
释义 | > as lemmasChandler wobble Used attributively with reference to a non-seasonal elliptical motion of the earth's poles of rotation with a variable period of approximately 14 months (reported by Chandler in 1891); as Chandler period, Chandler wobble. ΘΚΠ the world > the universe > planet > primary planet > earth > [noun] > movement of earth > variation in wobble1699 Chandler wobble1955 1955 Observatory Feb. 1 Efforts to find the Chandler period of the variation of latitude..go back over fifty years. 1958 A. E. Scheidegger Princ. Geodynamics iii. 107 An analysis of the observations on latitude variation yields that, after an annual term..has been taken out, a period of approximately 420 days exists (Chandler wobble). 1965 Geophysical Jrnl. 10 290 For over 60 years it was considered highly probable that the Chandler wobble was excited by irregular (i.e. non-seasonal) fluctuations in the geographical distribution of atmospheric mass. 1971 M. Chinnery in I. G. Gass et al. Understanding Earth vi. 93/1 The variation in the Chandler period (about ±4%) is rather large, and it seems unlikely that changes in the physical state of the Earth large enough to produce this can occur in times of the order of a year. 1983 Nature 24 Feb. 657/3 The outstanding problem in the study of the Chandler wobble is..the source of its excitation. < as lemmas |
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