Sentences with phrase «secular variation»
Improved understanding of secular variation of Earth's magnetic field, and core structure and dynamics, including quantification of rapid field decrease that may signal a reversal of the Earth's field.
polenet.org
On the basis of these observations we conclude that class I excursions, epitomized by the Laschamp Excursion, are more closely related to normal secular variation and are not necessarily a prelude to magnetic field reversal.»
The hockey stick attempted to wipeout secular variations prior to the 20th century, but even Mike's Nature trick spliced the early 20th century warming as an integral part of the blade.
«Secular Variations of the Cosmic - Ray - Produced Carbon - 14 in the Atmosphere and Their Interpretation.»
Secular variations in the solar corona shape according to observations during a solar activity minimum epoch.
All of these features, with the exception of anomalously large directional amplitude, are consistent with normal magnetic field secular variation.
Three general models of secular variation are described that can qualitatively produce class I excursions.
AWP variability occurs on both interannual and multidecadal timescales as well as with a secular variation.
The criterion to choose the regularisation factors, therefore, has been based on a comparison to geomagnetic power spectra of the current and historical main field and secular variations.
Three general models of secular variation are described that can qualitatively produce class I excursions.