Excursions in geomagnetism
Article Abstract:
Guyodo and Valet have produced a new stack of globally distributed, following analysis of records of relative paleomagnetic intensity. Spectral analysis of Sint-800 compared each 400,000 year long interval, in stages of 100,000 years, and provided no evidence of a dominant stable periodicity in paleomagnetic intensity. Gubbins has formulated a new hypothesis that relates excursions to processes in the Earth's core, in that such excursions occur when the geomagnetic field reverses in the liquid outer core, and their short duration is consistent with estimated diffusion times.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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A doubling of the Sun's coronal magnetic field during the past 100 years
Article Abstract:
The total magnetic flux leaving the Sun has increased by a factor of 1.4 since 1964. The geomagnetic activity index has moved upward throughout most of the 20th century, almost entirely as a result of variations in near-Earth interplanetary space. It appears that the dynamo generating the solar field could be chaotic rather than quasi-periodic. It is clear that there is a need to understand the links between the Sun's output and its magnetic field.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Turbulent excursions
Article Abstract:
The turbulence in fluid motion causes innumerable variations in flow velocities. The possible values of the velocity difference is too complex to be calculated according to the Kolmogorov theory. The velocity calculation and fluid motion design are complex tasks. The swirling flows also carry passive constituents, such as other fluids, solids, or heat, and the degree of their mixing depends on the extent of turbulence.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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