Are there connections between the Earth's magnetic field and climate?
International audience Understanding climate change is an active topic of research. Much of the observed increase in global surface temperature over the past 150 years occurred prior to the 1940s and after the 1980s. The main causes invoked are solar variability, changes in atmospheric greenhouse ga...
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Online Access: | https://hal.science/hal-00149342 https://doi.org/10.1016/j.epsl.2006.10.032 |
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ftunivnantes:oai:HAL:hal-00149342v1 2023-05-15T17:36:16+02:00 Are there connections between the Earth's magnetic field and climate? Courtillot, Vincent Gallet, Yves Le Mouël, Jean-Louis Fluteau, Frédéric Genevey, Agnès Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Centre de recherche et de restauration des musées de France (C2RMF) Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS) 2007 https://hal.science/hal-00149342 https://doi.org/10.1016/j.epsl.2006.10.032 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2006.10.032 hal-00149342 https://hal.science/hal-00149342 doi:10.1016/j.epsl.2006.10.032 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-00149342 Earth and Planetary Science Letters, 2007, 253 (3-4), pp.328-339. ⟨10.1016/j.epsl.2006.10.032⟩ geomagnetism archeomagnetism paleomagnetism climate change [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology info:eu-repo/semantics/article Journal articles 2007 ftunivnantes https://doi.org/10.1016/j.epsl.2006.10.032 2023-02-08T09:39:51Z International audience Understanding climate change is an active topic of research. Much of the observed increase in global surface temperature over the past 150 years occurred prior to the 1940s and after the 1980s. The main causes invoked are solar variability, changes in atmospheric greenhouse gas content or sulfur due to natural or anthropogenic action, or internal variability of the coupled ocean–atmosphere system. Magnetism has seldom been invoked, and evidence for connections between climate and magnetic field variations have received little attention. We review evidence for correlations which could suggest such (causal or non-causal) connections at various time scales (recent secular variation not, vert, similar 10–100 yr, historical and archeomagnetic change not, vert, similar 100–5000 yr, and excursions and reversals not, vert, similar 103–106 yr), and attempt to suggest mechanisms. Evidence for correlations, which invoke Milankovic forcing in the core, either directly or through changes in ice distribution and moments of inertia of the Earth, is still tenuous. Correlation between decadal changes in amplitude of geomagnetic variations of external origin, solar irradiance and global temperature is stronger. It suggests that solar irradiance could have been a major forcing function of climate until the mid-1980s, when “anomalous” warming becomes apparent. The most intriguing feature may be the recently proposed archeomagnetic jerks, i.e. fairly abrupt (not, vert, similar 100 yr long) geomagnetic field variations found at irregular intervals over the past few millennia, using the archeological record from Europe to the Middle East. These seem to correlate with significant climatic events in the eastern North Atlantic region. A proposed mechanism involves variations in the geometry of the geomagnetic field (f.i. tilt of the dipole to lower latitudes), resulting in enhanced cosmic-ray induced nucleation of clouds. No forcing factor, be it changes in CO2 concentration in the atmosphere or changes in cosmic ... Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Earth and Planetary Science Letters 253 3-4 328 339 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
geomagnetism archeomagnetism paleomagnetism climate change [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
spellingShingle |
geomagnetism archeomagnetism paleomagnetism climate change [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Courtillot, Vincent Gallet, Yves Le Mouël, Jean-Louis Fluteau, Frédéric Genevey, Agnès Are there connections between the Earth's magnetic field and climate? |
topic_facet |
geomagnetism archeomagnetism paleomagnetism climate change [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
description |
International audience Understanding climate change is an active topic of research. Much of the observed increase in global surface temperature over the past 150 years occurred prior to the 1940s and after the 1980s. The main causes invoked are solar variability, changes in atmospheric greenhouse gas content or sulfur due to natural or anthropogenic action, or internal variability of the coupled ocean–atmosphere system. Magnetism has seldom been invoked, and evidence for connections between climate and magnetic field variations have received little attention. We review evidence for correlations which could suggest such (causal or non-causal) connections at various time scales (recent secular variation not, vert, similar 10–100 yr, historical and archeomagnetic change not, vert, similar 100–5000 yr, and excursions and reversals not, vert, similar 103–106 yr), and attempt to suggest mechanisms. Evidence for correlations, which invoke Milankovic forcing in the core, either directly or through changes in ice distribution and moments of inertia of the Earth, is still tenuous. Correlation between decadal changes in amplitude of geomagnetic variations of external origin, solar irradiance and global temperature is stronger. It suggests that solar irradiance could have been a major forcing function of climate until the mid-1980s, when “anomalous” warming becomes apparent. The most intriguing feature may be the recently proposed archeomagnetic jerks, i.e. fairly abrupt (not, vert, similar 100 yr long) geomagnetic field variations found at irregular intervals over the past few millennia, using the archeological record from Europe to the Middle East. These seem to correlate with significant climatic events in the eastern North Atlantic region. A proposed mechanism involves variations in the geometry of the geomagnetic field (f.i. tilt of the dipole to lower latitudes), resulting in enhanced cosmic-ray induced nucleation of clouds. No forcing factor, be it changes in CO2 concentration in the atmosphere or changes in cosmic ... |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Centre de recherche et de restauration des musées de France (C2RMF) Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Courtillot, Vincent Gallet, Yves Le Mouël, Jean-Louis Fluteau, Frédéric Genevey, Agnès |
author_facet |
Courtillot, Vincent Gallet, Yves Le Mouël, Jean-Louis Fluteau, Frédéric Genevey, Agnès |
author_sort |
Courtillot, Vincent |
title |
Are there connections between the Earth's magnetic field and climate? |
title_short |
Are there connections between the Earth's magnetic field and climate? |
title_full |
Are there connections between the Earth's magnetic field and climate? |
title_fullStr |
Are there connections between the Earth's magnetic field and climate? |
title_full_unstemmed |
Are there connections between the Earth's magnetic field and climate? |
title_sort |
are there connections between the earth's magnetic field and climate? |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00149342 https://doi.org/10.1016/j.epsl.2006.10.032 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-00149342 Earth and Planetary Science Letters, 2007, 253 (3-4), pp.328-339. ⟨10.1016/j.epsl.2006.10.032⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2006.10.032 hal-00149342 https://hal.science/hal-00149342 doi:10.1016/j.epsl.2006.10.032 |
op_doi |
https://doi.org/10.1016/j.epsl.2006.10.032 |
container_title |
Earth and Planetary Science Letters |
container_volume |
253 |
container_issue |
3-4 |
container_start_page |
328 |
op_container_end_page |
339 |
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1766135701605187584 |