Some new approaches to the study of the Earth's magnetic field reversals
Paleomagnetic studies clearly show that the polarity of the magnetic fi eld has been subject to reversals. It is generally assumed that polarity intervals are exponentially distributed. Here, the geomagnetic polarity reversal record, for the past 166 Ma, is analysed and a new appro...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2003-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4372 |
| _version_ | 1818512590085554176 |
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| author | G. Consolini P. De Michelis |
| author_facet | G. Consolini P. De Michelis |
| author_sort | G. Consolini |
| collection | DOAJ |
| description | Paleomagnetic studies clearly show that the polarity of the magnetic fi eld has been subject to reversals. It is generally assumed that polarity intervals are exponentially distributed. Here, the geomagnetic polarity reversal record, for the past 166 Ma, is analysed and a new approach to the study of the reversals is presented. In detail, the occurrence of 1/f-noise in the Power Spectral Density (PSD), relative to geomagnetic fi eld reversals, the existence of a Zipf's law behaviour for the cumulative distribution of polarity intervals, and the occurrence of punctuated equilibrium, as shown by a sort of Devil's staircase for the reversal time series, are investigated. Our results give a preliminary picture of the dynamical state of the geomagnetic dynamo suggesting that the geodynamo works in a marginally stable out-of-equilibrium confi guration, and that polarity reversals are equivalent to a sort of phase transition between two metastable states. |
| first_indexed | 2024-12-10T23:48:56Z |
| format | Article |
| id | doaj.art-382ad863f5b64d32bec1788eca9fc9b6 |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-12-10T23:48:56Z |
| publishDate | 2003-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-382ad863f5b64d32bec1788eca9fc9b62022-12-22T01:28:50ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2003-06-0146410.4401/ag-4372Some new approaches to the study of the Earth's magnetic field reversalsG. ConsoliniP. De MichelisPaleomagnetic studies clearly show that the polarity of the magnetic fi eld has been subject to reversals. It is generally assumed that polarity intervals are exponentially distributed. Here, the geomagnetic polarity reversal record, for the past 166 Ma, is analysed and a new approach to the study of the reversals is presented. In detail, the occurrence of 1/f-noise in the Power Spectral Density (PSD), relative to geomagnetic fi eld reversals, the existence of a Zipf's law behaviour for the cumulative distribution of polarity intervals, and the occurrence of punctuated equilibrium, as shown by a sort of Devil's staircase for the reversal time series, are investigated. Our results give a preliminary picture of the dynamical state of the geomagnetic dynamo suggesting that the geodynamo works in a marginally stable out-of-equilibrium confi guration, and that polarity reversals are equivalent to a sort of phase transition between two metastable states.http://www.annalsofgeophysics.eu/index.php/annals/article/view/4372Earth's magnetic fieldgeomagnetic reversalstime series analysis |
| spellingShingle | G. Consolini P. De Michelis Some new approaches to the study of the Earth's magnetic field reversals Annals of Geophysics Earth's magnetic field geomagnetic reversals time series analysis |
| title | Some new approaches to the study of the Earth's magnetic field reversals |
| title_full | Some new approaches to the study of the Earth's magnetic field reversals |
| title_fullStr | Some new approaches to the study of the Earth's magnetic field reversals |
| title_full_unstemmed | Some new approaches to the study of the Earth's magnetic field reversals |
| title_short | Some new approaches to the study of the Earth's magnetic field reversals |
| title_sort | some new approaches to the study of the earth s magnetic field reversals |
| topic | Earth's magnetic field geomagnetic reversals time series analysis |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4372 |
| work_keys_str_mv | AT gconsolini somenewapproachestothestudyoftheearthsmagneticfieldreversals AT pdemichelis somenewapproachestothestudyoftheearthsmagneticfieldreversals |