Introduction to the Physics of the Earth's Deep Interior

Physics Today ◽  
1992 ◽  
Vol 45 (3) ◽  
pp. 66-67
Author(s):  
Jean‐Paul Poirier ◽  
J. Michael Brown
Keyword(s):  
Deep Interior

scholarly journals Phase transitions beyond post-perovskite in NaMgF3 to 160 GPa

2019 ◽  
Vol 116 (39) ◽  
pp. 19324-19329 ◽  
Author(s):  
Rajkrishna Dutta ◽  
Eran Greenberg ◽  
Vitali B. Prakapenka ◽  
Thomas S. Duffy
Keyword(s):  
Phase Transitions ◽  
Diamond Anvil Cell ◽  
Extrasolar Planets ◽  
High Pressures ◽  
Model System ◽  
Similar Sequence ◽  
Deep Interior ◽  
Diamond Anvil ◽  
Binary Compounds ◽  
Pressure Phase

Neighborite, NaMgF3, is used as a model system for understanding phase transitions in ABX3 systems (e.g., MgSiO3) at high pressures. Here we report diamond anvil cell experiments that identify the following phases in NaMgF3 with compression to 162 GPa: NaMgF3 (perovskite) → NaMgF3 (post-perovskite) → NaMgF3 (Sb2S3-type) → NaF (B2-type) + NaMg2F5 (P21/c) → NaF (B2) + MgF2 (cotunnite-type). Our results demonstrate the existence of an Sb2S3-type post-post-perovskite ABX3 phase. We also experimentally demonstrate the formation of the P21/c AB2X5 phase which has been proposed theoretically to be a common high-pressure phase in ABX3 systems. Our study provides an experimental observation of the full sequence of phase transitions from perovskite to post-perovskite to post-post-perovskite followed by 2-stage breakdown to binary compounds. Notably, a similar sequence of transitions is predicted to occur in MgSiO3 at ultrahigh pressures, where it has implications for the mineralogy and dynamics in the deep interior of large, rocky extrasolar planets.

scholarly journals Far-Field Inversion for the Deep Interior Scanning CubeSat

2019 ◽  
Vol 55 (4) ◽  
pp. 1683-1697 ◽  
Author(s):  
Mika Takala ◽  
Patrick Bambach ◽  
Jakob Deller ◽  
Esa Vilenius ◽  
Manfred Wittig ◽  
...  
Keyword(s):  
Far Field ◽  
Deep Interior ◽  
Field Inversion

scholarly journals Quasigeostrophic Diagnosis of Mixed Layer Dynamics Embedded in a Mesoscale Turbulent Field

2016 ◽  
Vol 46 (1) ◽  
pp. 275-287 ◽  
Author(s):  
Cédric P. Chavanne ◽  
Patrice Klein
Keyword(s):  
Surface Layer ◽  
High Resolution ◽  
Mixed Layer ◽  
Finite Thickness ◽  
Vertical Mixing ◽  
Three Dimensional ◽  
Upper Ocean ◽  
Surface Mixed Layer ◽  
Deep Interior ◽  
Quasigeostrophic Model

AbstractA quasigeostrophic model is developed to diagnose the three-dimensional circulation, including the vertical velocity, in the upper ocean from high-resolution observations of sea surface height and buoyancy. The formulation for the adiabatic component departs from the classical surface quasigeostrophic framework considered before since it takes into account the stratification within the surface mixed layer that is usually much weaker than that in the ocean interior. To achieve this, the model approximates the ocean with two constant stratification layers: a finite-thickness surface layer (or the mixed layer) and an infinitely deep interior layer. It is shown that the leading-order adiabatic circulation is entirely determined if both the surface streamfunction and buoyancy anomalies are considered. The surface layer further includes a diabatic dynamical contribution. Parameterization of diabatic vertical velocities is based on their restoring impacts of the thermal wind balance that is perturbed by turbulent vertical mixing of momentum and buoyancy. The model skill in reproducing the three-dimensional circulation in the upper ocean from surface data is checked against the output of a high-resolution primitive equation numerical simulation.

Personhood in a Neurobiological Age

Neuro ◽  
2013 ◽  
Author(s):  
Nikolas Rose ◽  
Joelle M. Abi-Rached
Keyword(s):  
Causal Relation ◽  
Mental States ◽  
Modern Human ◽  
The Self ◽  
Self Management ◽  
Human Beings ◽  
Deep Interior

This chapter explores the neurobiological self. It argues that the emerging neuroscientific understandings of selfhood are unlikely to efface modern human beings' understanding of themselves as persons equipped with a deep interior world of mental states that have a causal relation to their action. Rather, they are likely to add a neurobiological dimension to human beings' self-understanding and their practices of self-management. In this sense, the “somatic individuality” which was once the province of the psy- sciences, is spreading to the neuro- sciences. Yet psy is not being displaced by neuro: neurobiological conceptions of the self are being construed alongside psychological ones.

Electromagnetic Induction from Europa’s Ocean and the Deep Interior

Europa ◽  
2017 ◽  
pp. 571-586 ◽  
Author(s):  
Krishan K. Khurana ◽  
Margaret G. Kivelson ◽  
Kevin P. Hand ◽  
Christopher T. Russell
Keyword(s):  
Electromagnetic Induction ◽  
Deep Interior
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