This periodic change in rotation might be due to a tug-of-war effect between the Earth’s liquid outer core and solid mantle, writes the Times. As molten metals move in the outer core, they generate electromagnetic forces that influence the inner core to spin. But the gravity o...
Earth’squickeningrotation has consequences because atomic clocks — which are used in GPS satellites — don’ttake into accountthe Earth’s changing rotation. 地球自转加速会产生一系列后果,因为用于GPS卫星的原子钟没有考虑到地球自转的变化。 quickenv(使)加快 / 加速 take into account 考虑到;顾及 If...
Text in the opening and “The observation” sections has been updated to more precisely describe changes in inner-core rotation as occurring relative to the Earth’s mantle. References Song, X. D. & Richards, P. G. Seismological evidence for differential rotation of the Earth’s inner core....
Tkali and colleagues which examines and measures the inner core rotation rate of the planet Earth. Topics discussed include the comparison of the rotation rate between the inner core and mantle of the planet, the seismic wave speeds, and the association of inertial forces to accelerations in the...
to slow down.) The gravity pull from the Moon also contributes to the slow down, acting a little like a lever break. However, the combination of these effects is not enough to explain the observations of the slowing down of Earth's rotation: a contribution from Earth's core must be ...
It is currently unknown whether the Earth's inner core is changing speed, as it is difficult to directly observe the inner core due to its depth and inaccessible location. However, some recent studies using seismic data have suggested that the inner core may be rotating slightly faster or slow...
The best interpretation of this is that the rotation of the core is changing over time, relative to the rotation of the mantle. That is... the core is always rotating in the same direction that the entire planet rotates (eastward), but sometimes it rotates faster ...
Rotation of the inner core We cannot observe the magnetic field inside the earth's core directly, but there is likely to be a large toroidal part of 10â100 Gauss which, to... D Gubbins - 《Journal of Geophysical Research Solid Earth》 被引量: 167发表: 1981年 Limits on differe...
"This globally consistent pattern suggests that inner-core rotation has recently paused," Yang and Songwrite. It also seems that this recent stalling of the inner core is associated with a rotation reversal, Yang and Song say, the solid iron sphere slipping back the other way as part of a ...
1.2 Rotation 1.3 Moon(s) 1.4 Geology 1.5 Atmosphere and gravity 1.6 Geography 1.7 Physical data 2 Sapient native species 3 Flora and fauna 4 Historical significance 4.1 Early history 4.1.1 Origin 4.1.2 Before life 4.1.3 Creation of life 4.1.4 First terrestrial life 4.1.5 Dinosaurs, Siluri...