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Attractor dimensions in non‐linear fluctuations of length of the day (LOD) variations
Author(s) -
Tiwari R. K.,
Negi J. G.,
Rao K. N. N.
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl02318
Subject(s) - attractor , curse of dimensionality , statistical physics , physics , chaotic , measure (data warehouse) , degrees of freedom (physics and chemistry) , day length , dynamical systems theory , range (aeronautics) , climatology , statistics , mathematics , geology , mathematical analysis , computer science , quantum mechanics , materials science , database , composite material , medicine , photoperiodism , artificial intelligence
Recent developments in the theory of non‐linear dynamical systems have been used to find dimensionality of the chaotic behaviour of the short term fluctuations in the Length of Day (LOD). Here we report, for the first time, the measure of attractor dimensions in the latest LOD data spanning over a period of approximately 15 years (1976–1990). Our analysis of daily variations of LOD indicate an evidence of low dimensional attractor of the system in the range 5 to 7. It can be inferred that the underlying dynamics has limited degrees of freedom and influenced by non‐random atmospheric and oceanic processes. We believe that the results may help to constrain models of linkages between earth's rotation and air‐sea interactions.