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secular variation

   Also found in: Wikipedia 0.01 sec.
secular variation [′sek·yə·lər ‚ver·ē′ā·shən]
(astronomy)
A perturbation of the moon's motion caused by variations in the effect of the sun's gravitational attraction on the earth and moon as their relative distances from the sun vary during the synodic month.
(geophysics)
The changes, measured in hundreds of years, in the magnetic field of the earth. Also known as geomagnetic secular variation.
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They include recurrence quantification analysis of bipolar disorder performed using a Van der Pol oscillator model, detecting low-dimensional chaos in small noisy sample sets, Alan Turing meets the Sphinx, fractal geometry in computer graphics and in virtual reality, buyer decisions in the US housing industry, secular variation in the climatic memory of five Italian deep lakes, and in everyday action notes for a mindscape of bioethics.
Progress in chaos and complexity research by SciTech Book News
Although small in comparison with the main dipole field, secular variation can be difficult to predict with effects substantial enough to prompt a revision of the International Geomagnetic Reference Field every five years.
Variations in Earth's magnetic field maybe due to ebb and flow of ... by Asian News International
Other variables display little secular variation relative to GDP, whether they are corporate after-tax profits or corporate physical capital relative to GDP.
The transformation of macroeconomic policy and research by Prescott, Edward C. / American Economist
 
 
 
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