“The team found a secondary flow pattern when they modeled the geodynamo – which generates the Earth's magnetic field – to build a more detailed picture of convection in the Earth's outer core, a secondary flow pattern consisting of inner sheet-like radial plumes, surrounded by westward cylindrical zonal flow.”
“Top to bottom shows how flow responds to increasing angular velocities of the whole geodynamo system.”
“This kind of zonal flow in the outer core has not been seen in geodynamo models before, due largely to lack of sufficient resolution in earlier models.”
“About the image: This image shows how an imaginary particle suspended in the liquid iron outer core of the Earth tends to flow in zones even when conditions in the geodynamo are varied.”
“Does anyone really think about the geodynamo-interrupting implications of harvesting the byproduct (and the otherwise perpetuative electrochemical factor) of the tidal interactions between the Earth and the Moon?”
“For the first time, scientists have directly measured the amount of heat flowing from the molten metal of Earth's core into a region at the base of the mantle, a process that helps drive both the movement of tectonic plates at the surface and the geodynamo in the core that generates Earth's magnetic field.”
“' We postulate, '' Dr. Hulot and his co-authors wrote, that the new evidence reflects how '' the geodynamo operates before reversing. '”
“Investigators looking into the origin of the reversals got new clues in 1995 when scientists at the Los Alamos National Laboratory and the University of California at Los Angeles succeeded in making the first computer simulation of the geodynamo in action, including field reversals.”
“To try to determine these finer details, Akira Kageyama at Kobe University and colleagues have modelled the geodynamo in search of a more detailed picture of convection in the Earth's outer core.”
“Kageyama told physicsworld. com that this kind of zonal flow has never been included in geodynamo models to date and that it could provide a "hint" about the mechanism of polar reversal.”
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