DI31B:
New Insights into the Earth's Core I

Submit an Abstract to this Session



Session ID#: 32055

Session Description:
The history of Earth’s core remains debated and poorly constrained even as new experiments and observations have contributed to our understanding of the thermal state of outer core and the nucleation of the inner core. Scenarios for the operation and history of the dynamo are challenged by evidence of a stable stratified layer at the outer core’s upper boundary, a high value of thermal conductivity, and the presence of an early magnetic field. In the inner core, seismic observations reveal complex lateral and vertical structure at a broad spectrum of spatial scales, with unknown links to the history of its crystallization, melting, and deformation. We hope this session will bring together a wide range of disciplines, including geodynamic modeling, high-pressure experiments, and seismic observations with the aim of a better understanding Earth’s core.
Primary Convener:  Ludovic Huguet, Université Grenoble Alpes, ISTerre, Grenoble, France
Conveners:  Vernon F Cormier, University of Connecticut, Groton, CT, United States and Robert Teed, University of Cambridge, Cambridge, United Kingdom
Chairs:  Ludovic Huguet, Université Grenoble Alpes, ISTerre, Grenoble, France, Robert Teed, University of Glasgow, Glasgow, G12, United Kingdom and Vernon F Cormier, University of Connecticut, Groton, CT, United States
OSPA Liaison:  Vernon F Cormier, University of Connecticut, Groton, CT, United States

Cross-Listed:
  • GP - Geomagnetism, Paleomagnetism and Electromagnetism
  • MR - Mineral and Rock Physics
  • S - Seismology
Index Terms:

1507 Core processes [GEOMAGNETISM AND PALEOMAGNETISM]
1510 Dynamo: theories and simulations [GEOMAGNETISM AND PALEOMAGNETISM]
3924 High-pressure behavior [MINERAL PHYSICS]
7207 Core [SEISMOLOGY]

Abstracts Submitted to this Session:

An accelerating high-latitude jet in Earth's core (Invited) (207302)
Philip W Livermore, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Christopher C Finlay, DTU National Space Institute, København Ø, Denmark and Rainer Hollerbach, Univ Leeds, Leeds, United Kingdom
Characterisation of columnar inertial modes in rapidly rotating spheres and spheroids (229380)
Andy Jackson, ETH Zurich, Zurich, Switzerland, Stefano Maffei, University of Colorado, Department of Physics, Boulder, CO, United States and Philip W Livermore, School of Earth & Environment, Leeds, United Kingdom
Formation and dynamics of a chemically stratified layer below the Earth's CMB (233048)
Mathieu Bouffard, Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany, Stephane Labrosse, Ecole Normale Supérieure Lyon, Lyon, France, Gael Choblet, Nantes Université, Univ Angers, Le Mans Université, CNRS, Laboratoire de Planétologie et Géosciences, LPG UMR 6112, Nantes, France, Julien Aubert, Institut de Physique du Globe, Paris, France and Alexandre Fournier, Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France
Normal Mode Derived Models of the Physical Properties of Earth’s Outer Core (253450)
Jessica C E Irving, University of Bristol, School of Earth Sciences, Bristol, BS8, United Kingdom, Sanne Cottaar, University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, Vedran Lekic, University of Maryland, Department of Geology, College Park, United States and Wenbo Wu, Princeton University, Princeton, United States
Evidence for Radial Anisotropy in Earth's Upper Inner Core from Normal Modes (Invited) (223213)
Karen Lythgoe, Nanyang Technological University, Earth Observatory of Singapore, Singapore, Singapore and Arwen Fedora Deuss, Utrecht University, Utrecht, Utrecht, Netherlands
Earth Inner Core Anisotropy using PKiKP and PKIIKP Reflection Pairs (266155)
Jessica Chew1, Hao Hu2 and Yingcai Zheng1, (1)University of Houston, Earth and Atmospherical Sciences Dept, Houston, TX, United States, (2)University of Houston, EAS, Houston, TX, United States
Temporal changes of the inner core from waveform doublets (238675)
Yi Yang, Department of Geology, University of Illinois at Urbana Champaign, Urbana, United States and Xiaodong Song, Peking University, Institute of Theoretical and Applied Geophysics, Beijing, China
Topography at the inner core boundary (222580)
Marine Lasbleis, Tokyo Institute of Technology, Earth Life Science Institute, Tokyo, Japan, Quiterie Forquenot, Tokyo Institute of Technology, Earth-Life Science Institute, Tokyo, Japan and Renaud Deguen, LGLTPE Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement, Villeurbanne, France

See more of: Study of Earth's Deep Interior