Geomagnetic jerks in the polar regions

The occurrence of geomagnetic jerks over the Arctic and Antarctic regions is here investigated. Maps of geomagnetic secular acceleration over the polar regions are produced from the CM4 and CHAOS models and the occurrence of geomagnetic jerks is associated with jumps in secular acceleration. The obt...

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Published in:Geophysical Research Letters
Main Authors: Tozzi, R., De Michelis, P., Meloni, A.
Other Authors: Tozzi, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, De Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Format: Article in Journal/Newspaper
Language:English
Published: AGU 2009
Subjects:
geomagnetic jerks
magnetic global models
geomagnetic secular variation
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
Antarctic
Arctic
Antarc*
Antarctica
Online Access:http://hdl.handle.net/2122/5167
https://doi.org/10.1029/2009GL039359
id ftingv:oai:www.earth-prints.org:2122/5167
record_format openpolar
institution Open Polar
collection Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
op_collection_id ftingv
language English
topic geomagnetic jerks
magnetic global models
geomagnetic secular variation
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
spellingShingle geomagnetic jerks
magnetic global models
geomagnetic secular variation
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
Tozzi, R.
De Michelis, P.
Meloni, A.
Geomagnetic jerks in the polar regions
topic_facet geomagnetic jerks
magnetic global models
geomagnetic secular variation
04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals
04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models
04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
description The occurrence of geomagnetic jerks over the Arctic and Antarctic regions is here investigated. Maps of geomagnetic secular acceleration over the polar regions are produced from the CM4 and CHAOS models and the occurrence of geomagnetic jerks is associated with jumps in secular acceleration. The obtained results confirm that in Antarctica geomagnetic jerks systematically follow geomagnetic jerks in the Arctic region with a time delay from one to three years. Evidence is found of an abrupt change in secular acceleration in both polar regions around 1985, suggesting that the 1985 local jerk could actually be a worldwide event. Combining our results with the results previously obtained on the occurrence of a geomagnetic jerk at low-mid latitudes around 2003, we support the hypothesis of a global extension of an event occurred at the beginning of the 21st century. Published L15304 3.4. Geomagnetismo JCR Journal reserved
author2 Tozzi, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
De Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
format Article in Journal/Newspaper
author Tozzi, R.
De Michelis, P.
Meloni, A.
author_facet Tozzi, R.
De Michelis, P.
Meloni, A.
author_sort Tozzi, R.
title Geomagnetic jerks in the polar regions
title_short Geomagnetic jerks in the polar regions
title_full Geomagnetic jerks in the polar regions
title_fullStr Geomagnetic jerks in the polar regions
title_full_unstemmed Geomagnetic jerks in the polar regions
title_sort geomagnetic jerks in the polar regions
publisher AGU
publishDate 2009
url http://hdl.handle.net/2122/5167
https://doi.org/10.1029/2009GL039359
geographic Antarctic
Arctic
geographic_facet Antarctic
Arctic
genre Antarc*
Antarctic
Antarctica
Arctic
genre_facet Antarc*
Antarctic
Antarctica
Arctic
op_relation Geophysical Research Letters
/36 (2009)
Alexandrescu, M., D. Gibert, G. Hulot, J. L. Moue¨l, and G. Saracco (1995), Detection of geomagnetic jerks using wavelet analysis, J. Geophys. Res., 100, 12,557– 12,572. Alexandrescu, M., D. Gibert, G. Hulot, J. L. Moue¨l, and G. Saracco (1996), Worldwide wavelet analysis of geomagnetic jerks, J. Geophys. Res., 101, 21,975– 21,994. Chambodut, A., and M. Mandea (2005), Evidence for geomagnetic jerks in comprehensive models, Earth Planets Space, 57, 139– 149. Chambodut, A., C. Eymin, and M. Mandea (2007), Geomagnetic jerks from the Earth’s surface to the top of the core, Earth Planets Space, 59, 675– 684. De Michelis, P., and R. Tozzi (2005), A local intermittency measure (LIM) approach to the detection of geomagnetic jerks, Earth Planet. Sci. Lett., 235, 261– 272, doi:10.1016/j.espl.2005.04.001. De Michelis, P., L. Cafarella, and A. Meloni (1998),Worldwide character of the 1991 geomagnetic jerk, Geophys. Res. Lett., 25, 377–380. Kotze´, P. (2003), The time-varying geomagnetic field of southern africa, Earth Planets Space, 55, 111–116. Malin, S., and B. Hodder (1982),Was the 1970 geomagnetic jerk of internal or external origin?, Nature, 296, 726–728. Mandea, M., E. Bellanger, and J. L. Moue¨l (2000), A geomagnetic jerk for the end of the 20th century?, Earth Planet. Sci. Lett., 183, 369– 373. Olsen, N., and M. Mandea (2007), Investigation of a secular variation impulse using satellite data: The 2003 geomagnetic jerk, Earth Planet. Sci. Lett., 255, 94– 105, doi:10.1016/j.epsl.2006.12.008. Olsen, N., and M. Mandea (2008), Rapidly changing flows in the Earth’s core, Nat. Geosci., 1, 390–394, doi:10.1038/ngeo203. Olsen, N., H. Lu¨hr, T. Sabaka, M. Mandea, M. Rother, L. Tofner-Clausen, and S. Choi (2006), CHAOS-a model of the earth’s magnetic field derived from CHAMP, Ørsted, and SAC-C magnetic satellite data, Geophys. J. Int., 166, 67–75, doi:10.1111/j.1365-246X.2006.02959.x. Pinheiro, K., and A. Jackson (2008), Can a 1-D mantle electrical conductivity model generate magnetic jerk differential time delays?, Geophys. J. Int., 173, 781–792, doi:10.1111/j.1365-246X.2008.03762.x. Sabaka, T., N. Olsen, and R. Langel (2002), A comprehensive model of the quiet-time, near-Earth magnetic field: Phase 3, Geophys. J. Int., 151, 32–68. Sabaka, T., N. Olsen, and M. Purucker (2004), Extending comprehensive models of the Earth’s magnetic field with Ørsted and CHAMP data, Geophys. J. Int., 159, 521– 547. Wessel, P., and W. H. F. Smith (1991), Free software helps map and display data, Eos Trans. AGU, 72(41), 441.
http://hdl.handle.net/2122/5167
doi:10.1029/2009GL039359
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spelling ftingv:oai:www.earth-prints.org:2122/5167 2023-05-15T13:51:40+02:00 Geomagnetic jerks in the polar regions Tozzi, R. De Michelis, P. Meloni, A. Tozzi, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia De Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia 2009-08-08 http://hdl.handle.net/2122/5167 https://doi.org/10.1029/2009GL039359 en eng AGU Geophysical Research Letters /36 (2009) Alexandrescu, M., D. Gibert, G. Hulot, J. L. Moue¨l, and G. Saracco (1995), Detection of geomagnetic jerks using wavelet analysis, J. Geophys. Res., 100, 12,557– 12,572. Alexandrescu, M., D. Gibert, G. Hulot, J. L. Moue¨l, and G. Saracco (1996), Worldwide wavelet analysis of geomagnetic jerks, J. Geophys. Res., 101, 21,975– 21,994. Chambodut, A., and M. Mandea (2005), Evidence for geomagnetic jerks in comprehensive models, Earth Planets Space, 57, 139– 149. Chambodut, A., C. Eymin, and M. Mandea (2007), Geomagnetic jerks from the Earth’s surface to the top of the core, Earth Planets Space, 59, 675– 684. De Michelis, P., and R. Tozzi (2005), A local intermittency measure (LIM) approach to the detection of geomagnetic jerks, Earth Planet. Sci. Lett., 235, 261– 272, doi:10.1016/j.espl.2005.04.001. De Michelis, P., L. Cafarella, and A. Meloni (1998),Worldwide character of the 1991 geomagnetic jerk, Geophys. Res. Lett., 25, 377–380. Kotze´, P. (2003), The time-varying geomagnetic field of southern africa, Earth Planets Space, 55, 111–116. Malin, S., and B. Hodder (1982),Was the 1970 geomagnetic jerk of internal or external origin?, Nature, 296, 726–728. Mandea, M., E. Bellanger, and J. L. Moue¨l (2000), A geomagnetic jerk for the end of the 20th century?, Earth Planet. Sci. Lett., 183, 369– 373. Olsen, N., and M. Mandea (2007), Investigation of a secular variation impulse using satellite data: The 2003 geomagnetic jerk, Earth Planet. Sci. Lett., 255, 94– 105, doi:10.1016/j.epsl.2006.12.008. Olsen, N., and M. Mandea (2008), Rapidly changing flows in the Earth’s core, Nat. Geosci., 1, 390–394, doi:10.1038/ngeo203. Olsen, N., H. Lu¨hr, T. Sabaka, M. Mandea, M. Rother, L. Tofner-Clausen, and S. Choi (2006), CHAOS-a model of the earth’s magnetic field derived from CHAMP, Ørsted, and SAC-C magnetic satellite data, Geophys. J. Int., 166, 67–75, doi:10.1111/j.1365-246X.2006.02959.x. Pinheiro, K., and A. Jackson (2008), Can a 1-D mantle electrical conductivity model generate magnetic jerk differential time delays?, Geophys. J. Int., 173, 781–792, doi:10.1111/j.1365-246X.2008.03762.x. Sabaka, T., N. Olsen, and R. Langel (2002), A comprehensive model of the quiet-time, near-Earth magnetic field: Phase 3, Geophys. J. Int., 151, 32–68. Sabaka, T., N. Olsen, and M. Purucker (2004), Extending comprehensive models of the Earth’s magnetic field with Ørsted and CHAMP data, Geophys. J. Int., 159, 521– 547. Wessel, P., and W. H. F. Smith (1991), Free software helps map and display data, Eos Trans. AGU, 72(41), 441. http://hdl.handle.net/2122/5167 doi:10.1029/2009GL039359 restricted geomagnetic jerks magnetic global models geomagnetic secular variation 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models 04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field article 2009 ftingv https://doi.org/10.1029/2009GL039359 https://doi.org/10.1016/j.espl.2005.04.001 2022-07-29T06:05:21Z The occurrence of geomagnetic jerks over the Arctic and Antarctic regions is here investigated. Maps of geomagnetic secular acceleration over the polar regions are produced from the CM4 and CHAOS models and the occurrence of geomagnetic jerks is associated with jumps in secular acceleration. The obtained results confirm that in Antarctica geomagnetic jerks systematically follow geomagnetic jerks in the Arctic region with a time delay from one to three years. Evidence is found of an abrupt change in secular acceleration in both polar regions around 1985, suggesting that the 1985 local jerk could actually be a worldwide event. Combining our results with the results previously obtained on the occurrence of a geomagnetic jerk at low-mid latitudes around 2003, we support the hypothesis of a global extension of an event occurred at the beginning of the 21st century. Published L15304 3.4. Geomagnetismo JCR Journal reserved Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic Arctic Geophysical Research Letters 36 15 n/a n/a

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