New research gives the first accurate estimate of how much faster the Earth’s core is rotating compared to the rest of the planet. Previous research had shown that the Earth’s core rotates faster than the rest of the planet.
Although the inner core is 5200 kilometers beneath our feet, the effect of its presence is especially important on the Earth’s surface. In particular, as the inner core grows, the heat released during solidification drives convection in the fluid in the outer core. This convection generates the Earth’s geomagnetic field.
“Results in the first observation show a slower inner core rotation rate. It therefore provides a confirmed value which can now be used in simulations to model the convection of the Earth’s fluid outer core, giving us additional insight into the evolution of our magnetic field.” said Lauren Waszek, first author on the paper and a PhD student from the University of Cambridge’s Department of Earth Sciences.
FULL ARTICLE – http://bit.ly/gktith