GP009
Insights on the geodynamo and core processes from simulations and observations

Session ID#: 81020

Session Description:
The temporal variations and evolution of Earth's magnetic field generated by the geodynamo provide indispensable insights into core dynamics, core-mantle interactions and their coevolution, and shielding of the atmosphere from the solar wind. Geomagnetic observations reveal a broad range of geodynamo variations on timescales from decades to hundreds of millions of years. This session seeks to bring together the observational and modeling communities to convene on the current understanding of geomagnetic field variations and the deep-earth properties and dynamics we can interpret. There are many remaining challenges in relating predictions from theory and numerical simulations to observations from diverse sources (e.g. satellites, ground observatories, archeomagnetic and paleomagnetic data). Cross-disciplinary communication and collaborations provide pathways towards better constraining our understanding of the deep earth. We invite contributions from measurements, simulations and theoretical investigations of Earth’s magnetic field that provide insight into deep interior processes affecting geodynamo variations on any timescale.
Co-Organized:
  • DI - Study of the Earth's Deep Interior
Index Terms:

1507 Core processes [GEOMAGNETISM AND PALEOMAGNETISM]
1510 Dynamo: theories and simulations [GEOMAGNETISM AND PALEOMAGNETISM]
1527 Paleomagnetism applied to geologic processes [GEOMAGNETISM AND PALEOMAGNETISM]
1560 Time variations: secular and longer [GEOMAGNETISM AND PALEOMAGNETISM]

Primary Convener:  Margaret S Avery, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, CA, United States
Conveners:  Richard K. Bono, University of Liverpool, Liverpool, L69, United Kingdom and Christopher J. Davies, University of Leeds, Leeds, United Kingdom
Primary Liaison:  Richard K. Bono, University of Liverpool, Liverpool, L69, United Kingdom
 
Erosion of chemical stratification at the top of the Earth's core (Invited) (488783)
Maylis Landeau, Institut de Physique du Globe de Paris, Paris, France, Mathieu Bouffard, Max Planck Institute for Solar System Research, Göttingen, Germany and Alexis Goument, University of Nantes, Nantes, France
 
Regularity of geomagnetic field variations around 2003 and 2007: possible influence of the electrical conductivity heterogeneity at the bottom of the mantle (508966)
Hisayoshi Shimizu, University of Tokyo, Earthquake Research Institute, Bunkyo-ku, Japan
 
Magnetic flux expulsion from the Earth's core and extreme geomagnetic field intensity events (511526)
Alexandre Fournier1, Marie Troyano1, Yves Gallet1 and Christopher C Finlay2, (1)Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France, (2)DTU Space, Lyngby, Denmark
 
Inferring evolutions in core processes using stochastic models of the geodynamo (525222)
William Davis and Bruce A Buffett, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States
 
Complex wave decomposition of geomagnetic secular acceleration in the equatorial region of Earth’s core. (526854)
Rodrigo Chi-Duran, University of California, Berkeley, United States, Margaret S Avery, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, CA, United States and Bruce A Buffett, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States
 
The low geomagnetic secular variation and weak core flows in the Pacific (537662)
Mathieu Dumberry and Colin More, University of Alberta, Edmonton, AB, Canada
 
The Last Geomagnetic Intensity Cycle Initiative: A constrained time interval to build cross-disciplinary geomagnetic collaboration (601085)
Joseph Stephen Stoner1, Brendan T Reilly2 and Robert G Hatfield1, (1)Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, (2)CEOAS, Corvallis, OR, United States
See more of: Geomagnetism, Paleomagnetism and Electromagnetism
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