GP008
Highs, lows, and rapid variations in the Earth's magnetic field over the past 100 ka: data and models
Session ID#: 79365
Session Description:
The Earth’s magnetic field is highly variable on decadal to millennial timescales and over distances of hundreds to thousands of kilometers. A current example of a dynamic feature of the geomagnetic field is the South Atlantic Anomaly, an evolving region with anomalously low field strengths. Geomagnetic anomalies may also exhibit extremely high field strengths, with the Levantine Iron Age geomagnetic spike being the most prominent example. Rapid field changes and low intensities with broad geographic variations are also evident during geomagnetic excursions that are manifest over the 0-100 ka interval. The origin, evolution, and demise of short-lived features of the Earth’s magnetic field remain enigmatic. We solicit contributions that aim to provide progress in our understanding of such geomagnetic field behavior, with new data from archeological, igneous, or sedimentary material, or by improving our interpretation of these data using a variety of models of the geomagnetic field or geodynamo processes.
Index Terms:
1503 Archeomagnetism [GEOMAGNETISM AND PALEOMAGNETISM]
1513 Geomagnetic excursions [GEOMAGNETISM AND PALEOMAGNETISM]
1517 Magnetic anomalies: modeling and interpretation [GEOMAGNETISM AND PALEOMAGNETISM]
1521 Paleointensity [GEOMAGNETISM AND PALEOMAGNETISM]
Primary Convener: Annemarieke Béguin, Utrecht University, Paleomagnetic laboratory Fort Hoofddijk, Utrecht, Netherlands
Conveners: Catherine Constable, UCSD, La Jolla, CA, United States, Andrew Biggin, University of Liverpool, Liverpool, United Kingdom and Anita Di Chiara, Plymouth University, School of Earth, Ocean and Environmental Sciences, Plymouth, United Kingdom
Primary Liaison: Annemarieke Béguin, Utrecht University, Paleomagnetic laboratory Fort Hoofddijk, Utrecht, Netherlands
A Global View on Geomagnetic Excursions Through the Past 100 kyr (492780)
Monika C Korte, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 2.3 – Geomagnetism, Potsdam, Germany, Sanja Panovska, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany and Catherine Constable, UCSD, La Jolla, CA, United States
SCHA.DIF.4k: a New Regional Archeomagnetic Model for Europe for the Last 4 Millennia and its Application for Dating (Invited) (496238)
F. Javier Pavón-Carrasco1,2, Saioa A. Campuzano3, Mercedes Rivero-Montero2, Miriam Gomez-Paccard2 and Maria Luisa Osete1,2, (1)Complutense University of Madrid, Madrid, Spain, (2)Instituto de Geociencias (CSIC-UCM), Madrid, Spain, (3)Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy
Fast Geomagnetic Field Intensity Decrease Between 500 BC and 250 AD. New Archeointensity Data From South Uzbekistan. (496699)
Raquel Bonilla Alba1,2, Miriam Gomez-Paccard2, Elisabet Beamud3, Verónica Martínez-Ferreras4, Jose María Gurt-Esparraguera4, Enrique Ariño Gil5, Maria Luisa Osete1,2 and F. Javier Pavón-Carrasco1,2, (1)Complutense University of Madrid, Madrid, Spain, (2)Instituto de Geociencias (CSIC-UCM), Madrid, Spain, (3)Paleomagnetic Laboratory CCiTUB-ICTJA CSIC, Barcelona, Spain, (4)University of Barcelona, Barcelona, Spain, (5)University of Salamanca, Salamanca, Spain
Geomagnetic Field Intensity Changes During the Last 3 Millennia in the Central Mediterranean (Greece and Italy). (498378)
Mercedes Rivero-Montero1, Miriam Gomez-Paccard1, Despoina Kontopoulou2, Evdokia Tema3, Elina Aidona4 and F. Javier Pavón-Carrasco1,5, (1)Instituto de Geociencias (CSIC-UCM), Madrid, Spain, (2)Aristotle University of Thessaloniki, Department of Geophysics, School of Geology, Thessaloniki, Greece, (3)Università degli Studi di Torino, Dipartimento di Scienze della Terra, Torino, Italy, (4)Aristotle University of Thessaloniki, Thessaloniki, Greece, (5)Complutense University of Madrid, Madrid, Spain
Constraining the axial dipole moment variations during the historical period from new archeointensity results obtained in Bukhara (Uzbekistan, Central Asia) (499833)
Marie Troyano1, Yves Gallet1, Agnes Genevey2, Vladimir Pavlov3, Makhsuma Iliyasovna Niyazova4, Dzhamal Mirzaahmedov5 and Alexandre Fournier1, (1)Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France, (2)Sorbonne Université, CNRS, Laboratoire d’Archéologie Moléculaire et Structurale, LAMS, Paris, France, (3)Institute of Physics of the Earth RAS, Moscow, Russia, (4)Bukhara State Museum, historical department, Bukhara, Uzbekistan, (5)Academy of Science of the Republic of Uzbekistan, Institute of Archeology, Tashkent, Uzbekistan
Secular variation of the intensity of the geomagnetic field in Mexico over the last 3500 years (505190)
Gwenael Herve1, Mireille Perrin2, Luis Manuel Alva-Valdivia3, Brina Madingou Tchibinda2, Alejandro Rodriguez Trejo4, Arnaldo Hernandez Cardona5, Mario Cordova Tello6 and Carolina Meza Rodriguez6, (1)University Michel de Montaigne Bordeaux 3, Pessac Cedex, France, (2)CEREGE, Aix-en-Provence Cedex, France, (3)UNAM, Mexico City, Mexico, (4)Universidad Nacional Autonoma de Mexico, Mexico City, Mexico, (5)National Autonomous University of Mexico, Mexico City, Mexico, (6)Instituto Nacional de Antropologia e Historia, Centro Morelos, Cuernavaca, Mexico
Full Vector and 40Ar/39Ar Study of an Excursion Recorded by the Kaupo flow, Honolulu Volcanic Series, Oahu, Hawaii, USA: A new Excursion or just a Record of the Hilina Pali Episode? (524791)
Emilio Herrero-Bervera, University of Hawaii at Manoa, Honolulu, HI, United States and Brian R Jicha, University of Wisconsin Madison, Madison, WI, United States
Archeointensity results from El Papalote and Casas de Fuego furnaces, Chihuahua state, northern Mexico (539735)
Brina Tchibinda Madingou, Aix-en-Provence, CEDEX 4, France, Mireille Perrin, CEREGE, Aix-en-Provence Cedex, France, Arnaldo Hernandez Cardona, National Autonomous University of Mexico, Mexico City, Mexico, Luis Manuel Alva-Valdivia, UNAM, Mexico City, Mexico, Gwenael Herve, University Michel de Montaigne Bordeaux 3, Pessac Cedex, France, Shelby Anne Jones-Cervantes, CSU Fresno, San Diego, CA, United States, Lisa Tauxe, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States, Rafael Cruz Antillon Sr, Instituto Nacional de Anthropologia e Historia, Chihuahua, Mexico and Eric Blinman, New Mexico Department of Cultural Affairs, New Mexico Office of Archaeological Studies, Santa Fe, NM, United States
Geomagnetic Field variations between 68.9 and 14.5 ka recorded in Black Sea sediments (573196)
Liu Jiabo1,2, Norbert R Nowaczyk3, Monika C Korte4, Sanja Panovska4, Ute Frank3 and Helge W Arz5, (1)Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Germany, Section 4.3 – Paleoclimate and Landscape evolution, 14473 Potsdam, Potsdam, Germany, (2)Now at Southern University of Science and Technology, Department of Ocean Science and Engineering, Shenzhen, China, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 4.3 – Paleoclimate and Landscape evolution, Potsdam, Germany, (4)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 2.3 – Geomagnetism, Potsdam, Germany, (5)Leibniz Institute for Baltic Sea Research, Rostock, Germany
Two Palaeointensity Maxima and Rapid Directional Variation Rates During the Early Iron Age Recorded from Iberian Archaeological Sites. Implications on the Evolution of the Levantine Iron Age Anomaly from Global Modelling: The SHAWQ-Iron Age Model (577220)
Maria Luisa Osete1,2, Saioa A Campuzano3, Alberto Molina-Cardín1,2, Gustau Aguilella-Arzo4, Amparo Barrachina-Ibañez4, Ferrán Fallomir-Granell4, Arturo Oliver Foix4, Miriam Gomez-Paccard1, Fatima Martín-Hernández1,2, Alicia Palencia-Ortas2, F. Javier Pavón-Carrasco1,2 and Mercedes Rivero-Montero1, (1)Instituto de Geociencias (CSIC-UCM), Madrid, Spain, (2)Complutense University of Madrid, Madrid, Spain, (3)Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy, (4)Servicio de Investigaciones Arqueológicas y Prehistórica de la Diputación de Castellón, Castelló, Spain
Geomagnetic paleosecular variation from 42000 to 5000 cal years BP in southern Brazil: preliminary results (585437)
Everton Frigo1,2, Jairo F Savian2, Camila Trindade2, Jerônimo de Ayala Rocha2, Gelvam A Hartmann3, Ricardo IF Trindade4, Maria A Gomez Pivel2, João Carlos Coimbra2, Sandro Monticelli Petró2 and Adriana Leonhardt5, (1)UNIPAMPA Federal University of Pampa, Cacapava Do Sul, Brazil, (2)UFRGS Federal University of Rio Grande do Sul, Porto Alegre, Brazil, (3)UNICAMP State University of Campinas, Campinas, Brazil, (4)Universidade de São Paulo, Geophysics, São Paulo, Brazil, (5)FURG Federal University of Rio Grande, Rio Grande, Brazil
Paleomagnetic Secular Variations since middle Holocene in the Pearl River Delta, Southern China (633892)
Guanhua Li, Sun Yat-sen University, Zhuhai, China, Xiaoqiang Yang, Sun Yat-Sen University, Guangzhou, China and DS Xia, Lanzhou University, College of Earth Environmental Sciences, Lanzhou, China
