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Intermittent non-axial dipolar-field dominance of twin Laschamp excursions
Masayuki Hyodo 
,
Takeshi Nakagawa ,
Hayato Matsushita,
Ikuko Kitaba,
Keitaro Yamada ,
Shota Tanabe,
Balázs Bradák ,
Masako Miki,
Danielle McLean,
Richard A. Staff ,
Victoria C. Smith ,
Paul Albert ,
Christopher Bronk Ramsey ,
Akiteru Yamasaki,
Junko Kitagawa,
Gordon Schlolaut,
Katsuya Gotanda,
Kosuke Tsumura,
Kaito Inagawa,
Koyo Kumazawa,
Haruka Abe,
Saki Sugo,
Koki Takahashi,
Atsumi Kitamura,
(Suigetsu 2014 Project)
,
Takeshi Nakagawa ,
Hayato Matsushita,
Ikuko Kitaba,
Keitaro Yamada ,
Shota Tanabe,
Balázs Bradák ,
Masako Miki,
Danielle McLean,
Richard A. Staff ,
Victoria C. Smith ,
Paul Albert ,
Christopher Bronk Ramsey ,
Akiteru Yamasaki,
Junko Kitagawa,
Gordon Schlolaut,
Katsuya Gotanda,
Kosuke Tsumura,
Kaito Inagawa,
Koyo Kumazawa,
Haruka Abe,
Saki Sugo,
Koki Takahashi,
Atsumi Kitamura,
(Suigetsu 2014 Project)
Communications Earth & Environment, Volume: 3, Issue: 1
Swansea University Authors:
Danielle McLean, Paul Albert
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DOI (Published version): 10.1038/s43247-022-00401-0
Abstract
Geomagnetic excursions represent the dynamic nature of the geodynamo. Accumulated palaeomagnetic records indicate that such excursions are dominated by dipolar-fields, but exhibit different structures. Here we report a palaeomagnetic record from the varved sediments of Lake Suigetsu, central Japan,...
| Published in: | Communications Earth & Environment |
|---|---|
| ISSN: | 2662-4435 |
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Springer Science and Business Media LLC
2022
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa59815 |
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Here we report a palaeomagnetic record from the varved sediments of Lake Suigetsu, central Japan, which reveals fine structures in the Laschamp Excursion and a new post-Laschamp excursion that coincides with the Δ14C maxima. The record’s high-resolution chronology provides IntCal20 mid-ages and varve-counted durations. Both excursions comprise multiple subcentennial directional-swings. Simulations of filtering effects on sediment-magnetisations demonstrate that this high-resolution record replicates most of the features in existing, lower-resolution Laschamp excursion records, including the apparent clockwise open-loop of the virtual geomagnetic pole pass. The virtual geomagnetic poles during the ‘swing’ phases make four clusters centred in hemispherically-symmetric regions, three of which encompass the virtual geomagnetic poles associated with the Laschamp Excursion recorded in lavas at various locations. The stationary dipolar-field sources under each cluster should have intermittently dominated one after another during the excursions.</abstract><type>Journal Article</type><journal>Communications Earth &amp; Environment</journal><volume>3</volume><journalNumber>1</journalNumber><paginationStart/><paginationEnd/><publisher>Springer Science and Business Media LLC</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic>2662-4435</issnElectronic><keywords/><publishedDay>4</publishedDay><publishedMonth>4</publishedMonth><publishedYear>2022</publishedYear><publishedDate>2022-04-04</publishedDate><doi>10.1038/s43247-022-00401-0</doi><url/><notes/><college>COLLEGE NANME</college><department>Geography</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SGE</DepartmentCode><institution>Swansea University</institution><apcterm>Another institution paid the OA fee</apcterm><funders>This study was supported by grants 15H02143, 16J10887, 18K03804 and 18H03609 from the Japan Society for the Promotion of Science</funders><lastEdited>2022-05-06T15:38:59.4029262</lastEdited><Created>2022-04-13T13:28:14.0748346</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Geography</level></path><authors><author><firstname>Masayuki</firstname><surname>Hyodo</surname><orcid>0000-0002-6398-5498</orcid><order>1</order></author><author><firstname>Takeshi</firstname><surname>Nakagawa</surname><orcid>0000-0003-0831-6803</orcid><order>2</order></author><author><firstname>Hayato</firstname><surname>Matsushita</surname><order>3</order></author><author><firstname>Ikuko</firstname><surname>Kitaba</surname><order>4</order></author><author><firstname>Keitaro</firstname><surname>Yamada</surname><orcid>0000-0003-0611-8133</orcid><order>5</order></author><author><firstname>Shota</firstname><surname>Tanabe</surname><order>6</order></author><author><firstname>Balázs</firstname><surname>Bradák</surname><orcid>0000-0003-4101-8621</orcid><order>7</order></author><author><firstname>Masako</firstname><surname>Miki</surname><order>8</order></author><author><firstname>Danielle</firstname><surname>McLean</surname><order>9</order></author><author><firstname>Richard A.</firstname><surname>Staff</surname><orcid>0000-0002-8634-014x</orcid><order>10</order></author><author><firstname>Victoria C.</firstname><surname>Smith</surname><orcid>0000-0003-0878-5060</orcid><order>11</order></author><author><firstname>Paul</firstname><surname>Albert</surname><orcid>0000-0002-6757-1452</orcid><order>12</order></author><author><firstname>Christopher Bronk</firstname><surname>Ramsey</surname><orcid>0000-0002-8641-9309</orcid><order>13</order></author><author><firstname>Akiteru</firstname><surname>Yamasaki</surname><order>14</order></author><author><firstname>Junko</firstname><surname>Kitagawa</surname><order>15</order></author><author><firstname>Gordon</firstname><surname>Schlolaut</surname><order>16</order></author><author><firstname>Katsuya</firstname><surname>Gotanda</surname><order>17</order></author><author><firstname>Kosuke</firstname><surname>Tsumura</surname><order>18</order></author><author><firstname>Kaito</firstname><surname>Inagawa</surname><order>19</order></author><author><firstname>Koyo</firstname><surname>Kumazawa</surname><order>20</order></author><author><firstname>Haruka</firstname><surname>Abe</surname><order>21</order></author><author><firstname>Saki</firstname><surname>Sugo</surname><order>22</order></author><author><firstname>Koki</firstname><surname>Takahashi</surname><order>23</order></author><author><firstname>Atsumi</firstname><surname>Kitamura</surname><order>24</order></author><author><firstname>(Suigetsu 2014</firstname><surname>Project)</surname><order>25</order></author></authors><documents><document><filename>59815__24016__00081876582d454cb75494496f6b493d.pdf</filename><originalFilename>59815.pdf</originalFilename><uploaded>2022-05-06T15:36:38.1361823</uploaded><type>Output</type><contentLength>2132229</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>© The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License</documentNotes><copyrightCorrect>true</copyrightCorrect><language>eng</language><licence>http://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807> |
| spelling |
2022-05-06T15:38:59.4029262 v2 59815 2022-04-13 Intermittent non-axial dipolar-field dominance of twin Laschamp excursions 91d9fbf175c1335f16e8c2611c299c67 Danielle McLean Danielle McLean true false 7f8db9327402511d4d92849cb79af644 0000-0002-6757-1452 Paul Albert Paul Albert true false 2022-04-13 SGE Geomagnetic excursions represent the dynamic nature of the geodynamo. Accumulated palaeomagnetic records indicate that such excursions are dominated by dipolar-fields, but exhibit different structures. Here we report a palaeomagnetic record from the varved sediments of Lake Suigetsu, central Japan, which reveals fine structures in the Laschamp Excursion and a new post-Laschamp excursion that coincides with the Δ14C maxima. The record’s high-resolution chronology provides IntCal20 mid-ages and varve-counted durations. Both excursions comprise multiple subcentennial directional-swings. Simulations of filtering effects on sediment-magnetisations demonstrate that this high-resolution record replicates most of the features in existing, lower-resolution Laschamp excursion records, including the apparent clockwise open-loop of the virtual geomagnetic pole pass. The virtual geomagnetic poles during the ‘swing’ phases make four clusters centred in hemispherically-symmetric regions, three of which encompass the virtual geomagnetic poles associated with the Laschamp Excursion recorded in lavas at various locations. The stationary dipolar-field sources under each cluster should have intermittently dominated one after another during the excursions. Journal Article Communications Earth & Environment 3 1 Springer Science and Business Media LLC 2662-4435 4 4 2022 2022-04-04 10.1038/s43247-022-00401-0 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University Another institution paid the OA fee This study was supported by grants 15H02143, 16J10887, 18K03804 and 18H03609 from the Japan Society for the Promotion of Science 2022-05-06T15:38:59.4029262 2022-04-13T13:28:14.0748346 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Masayuki Hyodo 0000-0002-6398-5498 1 Takeshi Nakagawa 0000-0003-0831-6803 2 Hayato Matsushita 3 Ikuko Kitaba 4 Keitaro Yamada 0000-0003-0611-8133 5 Shota Tanabe 6 Balázs Bradák 0000-0003-4101-8621 7 Masako Miki 8 Danielle McLean 9 Richard A. Staff 0000-0002-8634-014x 10 Victoria C. Smith 0000-0003-0878-5060 11 Paul Albert 0000-0002-6757-1452 12 Christopher Bronk Ramsey 0000-0002-8641-9309 13 Akiteru Yamasaki 14 Junko Kitagawa 15 Gordon Schlolaut 16 Katsuya Gotanda 17 Kosuke Tsumura 18 Kaito Inagawa 19 Koyo Kumazawa 20 Haruka Abe 21 Saki Sugo 22 Koki Takahashi 23 Atsumi Kitamura 24 (Suigetsu 2014 Project) 25 59815__24016__00081876582d454cb75494496f6b493d.pdf 59815.pdf 2022-05-06T15:36:38.1361823 Output 2132229 application/pdf Version of Record true © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License true eng http://creativecommons.org/licenses/by/4.0/ |
| title |
Intermittent non-axial dipolar-field dominance of twin Laschamp excursions |
| spellingShingle |
Intermittent non-axial dipolar-field dominance of twin Laschamp excursions Danielle McLean Paul Albert |
| title_short |
Intermittent non-axial dipolar-field dominance of twin Laschamp excursions |
| title_full |
Intermittent non-axial dipolar-field dominance of twin Laschamp excursions |
| title_fullStr |
Intermittent non-axial dipolar-field dominance of twin Laschamp excursions |
| title_full_unstemmed |
Intermittent non-axial dipolar-field dominance of twin Laschamp excursions |
| title_sort |
Intermittent non-axial dipolar-field dominance of twin Laschamp excursions |
| author_id_str_mv |
91d9fbf175c1335f16e8c2611c299c67 7f8db9327402511d4d92849cb79af644 |
| author_id_fullname_str_mv |
91d9fbf175c1335f16e8c2611c299c67_***_Danielle McLean 7f8db9327402511d4d92849cb79af644_***_Paul Albert |
| author |
Danielle McLean Paul Albert |
| author2 |
Masayuki Hyodo Takeshi Nakagawa Hayato Matsushita Ikuko Kitaba Keitaro Yamada Shota Tanabe Balázs Bradák Masako Miki Danielle McLean Richard A. Staff Victoria C. Smith Paul Albert Christopher Bronk Ramsey Akiteru Yamasaki Junko Kitagawa Gordon Schlolaut Katsuya Gotanda Kosuke Tsumura Kaito Inagawa Koyo Kumazawa Haruka Abe Saki Sugo Koki Takahashi Atsumi Kitamura (Suigetsu 2014 Project) |
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Journal article |
| container_title |
Communications Earth & Environment |
| container_volume |
3 |
| container_issue |
1 |
| publishDate |
2022 |
| institution |
Swansea University |
| issn |
2662-4435 |
| doi_str_mv |
10.1038/s43247-022-00401-0 |
| publisher |
Springer Science and Business Media LLC |
| college_str |
Faculty of Science and Engineering |
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|
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facultyofscienceandengineering |
| hierarchy_top_title |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography |
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| description |
Geomagnetic excursions represent the dynamic nature of the geodynamo. Accumulated palaeomagnetic records indicate that such excursions are dominated by dipolar-fields, but exhibit different structures. Here we report a palaeomagnetic record from the varved sediments of Lake Suigetsu, central Japan, which reveals fine structures in the Laschamp Excursion and a new post-Laschamp excursion that coincides with the Δ14C maxima. The record’s high-resolution chronology provides IntCal20 mid-ages and varve-counted durations. Both excursions comprise multiple subcentennial directional-swings. Simulations of filtering effects on sediment-magnetisations demonstrate that this high-resolution record replicates most of the features in existing, lower-resolution Laschamp excursion records, including the apparent clockwise open-loop of the virtual geomagnetic pole pass. The virtual geomagnetic poles during the ‘swing’ phases make four clusters centred in hemispherically-symmetric regions, three of which encompass the virtual geomagnetic poles associated with the Laschamp Excursion recorded in lavas at various locations. The stationary dipolar-field sources under each cluster should have intermittently dominated one after another during the excursions. |
| published_date |
2022-04-04T04:17:24Z |
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1763754161527062528 |
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11.037056 |