Global changes in intensity of the Earth's magnetic field during the past 800 kyr

Article Abstract:

Records of relative paleointensity were integrated into a composite curve covering the past 800 kyr. The intensity of The Earth's dipole field was found to have experienced large-amplitude variations during the time span, with increased intensity minima occurring at times of known excursions in field direction. There was no stable periodicity found and the data does not support the hypothesis that the orbital parameters of the Earth have a direct impact on the geodynamo.

Paleomagnetism

---

Ancient inclinations

Article Abstract:

It has been recognized since the 19th century that the main element of the Earth's magnetic field is an axial dipole aligned with the rotation axis. However, new research shows that lower inclinations were exhibited in the Palaezoic and Precambrian ages, between 250 million and 3,500 million years ago. It is suggested that during these periods the axial dipole was joined by octupole and quadrupole components of the field.

Geomagnetism, Geomagnetic fields

---

Geomagnetic dipole strength and reversal rate over the past two million years

Article Abstract:

A composite curve that shows the evolution of the geomagnetic dipole strength and reversal rate is presented. The results revealed that the time-averaged field is higher during periods without reversals but the amplitude of the short-term oscillations remained the same.

United States, Science & research, Observations, Oscillation, Oscillations, Sediments (Geology), Magnetic pole, Geomagnetic poles

Similar abstracts:

• Abstracts: Rapid changes in ocean circulation and heat flux in the Nordic seas during the last interglacial period. Oceanic evidence for coherent fluctuations in Fennoscandian and Laurentide ice sheets on millennium timescales
• Abstracts: Neuronal correlates of parametric working memory in the prefrontal cortex. A chorus line. Neurobiology
• Abstracts: Semelparity and the evolution of maternal care in insects. The effect of relatedness on Gargaphia egg dumping behaviour
• Abstracts: Structural basis for activation of the titin kinase domain during myofibrillogenesis. Palindromic assembly of the giant muscle protein titin in the sarcomeric Z-dis
• Abstracts: Social constraints on the onset of incubation in a neotropical parrot: a nestbox addition experiment. Assessing parental effort in a Neotropical parrot: a comparison of methods

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.