The effect of rigidity or shear velocity of the inner core on the central density is discussed. Assuming maximum central densities of 13.6 g/cm 3 for an iron-nickel core and 13.0 g/cm 3 for an iron core, the discontinuity in density at the inner core boundary is estimated to be 1.2 g...
we experimentally confirmed for the first time that the 8.5 yr signal is the ICW. The evidence indicates that the inner core is tilted to the mantle along ~90°W, and the inverted tilt angle is 0.17 ± 0.03°; this static tilt angle means that the average density in the northwes...
The range of values we have assumed in the discussion above are an inner core density of \(13000\) kg/m3, thermal conductivity of \(100-300\) W/m/K, heat capacity of \(650\) J/kg/K, and thermal expansion coefficient of \(10-30\times {10}^{-6}/{\text{K}}\), the range ...
To address these issues, the amplitude ratio of PKiKP/PcP has been used for the inference of the density jump at the ICB as well as the shear velocity at the top of the inner core. Previous studies, however, were hampered by their large scatter, which precluded constraining relevant ...
Constraining large-scale mantle heterogeneity using mantle and inner-core sensitive normal modes Attempts to resolve density heterogeneity within the mantle using normal-mode data revealed an unexpected feature near the core-mantle boundary: regions of... M Ishii,J Tromp - 《Physics of the Earth &...
density contrast; ICB; inner core; PKiKP/PcP amplitude ratio; S-velocity contrast SUMMARY The density jump (ΔρICB) at the inner core boundary (ICB) is an important constraint on the dynamics and history of the Earth's core. Two types of seismological data sensitive to ΔρICB have been...
of enterprisecontentmanagement core modules for collaboration and the management of documents, records andWebcontent,aswell as the management of digital and multimedia assets. daccess-ods.un.org daccess-ods.un.org 未来阶段将着重于扩大部署用于文件协作和管理、记录 和网络内容以及管理数字和多媒体资产的企...
8.10.2.1 Composition of the Core The composition of the core remains ''an uncertain mixture of all the elements'' (Birch, 1952). The aver- age density of the Earth, the solar abundance of the elements, and the presence of iron meteorites, thought to be remnants of planetoid cores, all ...
1) Density contrast across the inner core boundary 内核边界密度差2) density boundary 密度边界 例句>> 3) density-change boundary 密度变化边界4) border contrast 边界衬度(反差)5) Kernel density estimation 内核密度估计 1. Based on the study on data distribution characteristics, a new robust...
Actin core bundles of auditory cell stereocilia have been demonstrated to be dynamic, ie, they undergo continuous assembly at the distal end of the bundle, treadmilling through the bundle, and disassembly at it proximal end. Calycal process core bundles are almost certainly also dynamic, as are...