GP21A:
Geomagnetic Field Behavior Across All Timescales: Data, Methods, and Applications I

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Session ID#: 34997

Session Description:
Unraveling past geomagnetic field changes is crucial not only to understand the geodynamo but also to investigate their influence on cosmogenic radionuclide production and climate. Direct measurements from satellites and geophysical observatories describe the spatial and temporal evolution of the geomagnetic field over the last centuries with high-resolution. In addition, paleomagnetic data obtained from volcanic rocks, sediments and archeological materials are used to investigate the time-varying behavior of the ancient geomagnetic field. However, the nature and origin of geomagnetic field fluctuations during the Holocene are still poorly understood. In this session we invite contributions that deal with the past variation of the geomagnetic field. We welcome contributions ranging from paleomagnetic data acquisition (directions and/or intensities) to geomagnetic field reconstructions both at local and global scales. This session may also provide space for results presenting new or revisited applications of paleomagnetism in other areas such as geochronological or climatic studies.
Primary Convener:  Miriam Gomez-Paccard, Spanish National Research Council, Institute of Geosciences IGEO (UCM, CSIC), Zaragoza, Spain
Conveners:  Annick Chauvin, University of Rennes, Rennes Cedex, France, Emilio Herrero-Bervera, Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa, Honolulu, HI, United States and Brian R Jicha, University of Wisconsin-Madison, Department of Geoscience, Madison, United States
Chairs:  Emilio Herrero-Bervera, University of Hawaii, Honolulu, HI, United States and Miriam Gomez-Paccard, Spanish National Research Council, Institute of Geosciences IGEO (UCM, CSIC), Zaragoza, Spain
OSPA Liaison:  Annick Chauvin, University of Rennes, Rennes Cedex, France
Index Terms:

1513 Geomagnetic excursions [GEOMAGNETISM AND PALEOMAGNETISM]
1521 Paleointensity [GEOMAGNETISM AND PALEOMAGNETISM]
1535 Reversals: process, timescale, magnetostratigraphy [GEOMAGNETISM AND PALEOMAGNETISM]
1560 Time variations: secular and longer [GEOMAGNETISM AND PALEOMAGNETISM]

Abstracts Submitted to this Session:

Fast geomagnetic Field Intensity Variations between 1400 and 400 BCE: New Archaeointensity Data from Germany (Invited) (217326)
Gwenaël Hervé1, Elisabeth Schnepp2, Carola Metzler-Nebelsick3, Florian Lhuillier4, Stuart Gilder3, Agnes Genevey5, Jörg Fassbinder6 and Yves Gallet7, (1)CEREGE, Aix-en-Provence Cedex, France, (2)University of Leoben, Leoben, Austria, (3)Ludwig Maximilians University of Munich, Munich, Germany, (4)Ludwig Maximilian University of Munich, Munich, Germany, (5)CNRS / Université Pierre et Marie Curie, Laboratoire d'Archéologie Moléculaire et Structurale, UMR 8220, Paris, France, (6)Bayerisches Landesamt für Denkmalpflege, Munich, Germany, (7)CNRS, Paris Cedex 16, France
The Holocene Geomagnetic Field: Spikes, Low Field Anomalies, and Asymmetries (Invited) (262591)
Catherine Constable, University of California San Diego, Scripps Institution of Oceanography, IGPP, La Jolla, CA, United States
Paleomagnetic Directions of 3-4ka Basaltic Volcanoes in the Aso Central Cone, Kyushu Japan: Contributions to the Paleosecular Variation and the Volcano-Stratigraphic Studies. (249316)
Hidetoshi Shibuya, Nobutatsu Mochizuki and Yasuo Miyabuchi, Kumamoto University, Kumamoto, Japan
Quaternary magnetic excursions recorded in marine sediments. (Invited) (208264)
James E T Channell, University of Florida, Ft Walton Beach, FL, United States
Equatorial Paleointensities from Kenya and the Well-behaved Geocentric Axial Dipole (Invited) (208146)
Huapei Wang, MIT Lincoln Laboratory, Lexington, MA, United States; China University of Geosciences, Planetary Science Institute, School of Earth Sciences, Wuhan, China and Dennis V Kent, Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States; Rutgers University, Department of Earth and Planetary Sciences, Piscataway, United States
Non-Dipole Features of the Geomagnetic Field May Persist for Millions of Years (Invited) (208103)
Joseph Biasi, California Institute of Technology, Geological and Planetary Sciences, Pasadena, United States and Joseph L Kirschvink, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, United States
Cosmogenic 10Be signature of geomagnetic dipole moment variations over the last 2 Ma (234611)
Quentin Simon1,2, Nicolas Thouveny3, Didier L Bourlès4, Jean-Pierre Valet2, Franck C Bassinot5, Tatiana Savranskaia2, Adrien Duvivier2,3, Sandrine Choy2,3, Laetitia Gacem2,6 and Anouk Villedieu2,5, (1)CEREGE, Aix en Provence, France, (2)Institut de Physique du Globe de Paris, Paris, France, (3)CEREGE, UM34, Aix Marseille Université, CNRS, IRD, Aix en Provence, France, (4)CEREGE, UM34, Aix Marseille Université, CNRS, IRD, Aix-en-Provence, France, (5)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette, France, (6)CEREGE, UM34, Aix Marseille Université, CNRS, IRD, Aix En Provence, France
Hotspot motion caused the Hawaiian-Emperor Bend and LLSVPs are not fixed (Invited) (264284)
John Anthony Tarduno, University of Rochester, Department of Physics and Astronomy, Rochester, NY, United States; University of Rochester, Department of Earth & Environmental Sciences, Rochester, NY, United States and Richard K. Bono, University of Liverpool, Liverpool, United Kingdom

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