The solid inner core is at the center of the Earth, gravitationally held within the liquid outer core. It is one of the most dynamic parts of Earth's interior. Since the initial claim of inner core differential rotation relative to the mantle, its existence and rate have been challenged ...
The researchful progress in dynamical theory of Inner core Earth rotation(Ⅵ)——The transfer function for nutations and dynamical effect of inner core内核地球自转动力学理论的研究进展(Ⅵ)—— 章动转换函数和内核的动力学效应ZHANG Han-wei,XU Hou-ze,WANG Ai-sheng,张捍卫, ,许厚泽 ,王爱生 ...
we confirm an approximate 8.5 yr signal in polar motion is the inner core wobble (ICW), and find that the ICW is also contained in the length-of-day variations of the Earth’s rotation. Based on the determined amplitudes of
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...
The researchers said this rotation roughly lines up with changes in what is called the "length of day" — small variations in the exact time it takes Earth to rotate on its axis. So far there is little to indicate that what the inner core does has much effect on we surface dwellers. ...
Differential rotation of Earth’s inner core relative to the mantle is thought to occur under the effects of the geodynamo on core dynamics and gravitational core–mantle coupling. This rotation has been inferred from temporal changes between repeated seismic waves that should traverse the same path...
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...
The finding that the Earth's inner core might be rotating faster than the mantle1 has important implications for our understanding of core processes, including the generation of the Earth's magnetic field2,3. But the reported signal is subtle—a change o
1) inner core 地球内核 1. The discovery of fast rotation of the earth′sinner coregive a full proof of the theory on the earth′s differential rotation in layer. 地球内核快速自转的发现,证实了地球圈层差异旋转理论,其动力学意义在于:(1)旋转系统有不同于非旋转系统的物质运动方式和能量转换方式;(...
We revisit the role played by the inner core on the rotation of a three layer Earth model composed by an axial -- symmetric rigid mantle, a fluid core, and an axial - symmetric rigid inner core. As it is well known, the presence of the rigid inner core introduces three additional degre...