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Multidecadally resolved polarity oscillations during a geomagnetic excursion

文献类型：期刊论文

作者Chou, Yu-Min1,2; Jiang, Xiuyang3; Liu, Qingsong2,4; Hu, Hsun-Ming1; Wu, Chung-Che1; Liu, Jianxing4,5; Jiang, Zhaoxia6; Lee, Teh-Quei7; Wang, Chun-Chieh8; Song, Yen-Fang8
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期2018-09-04
卷号115期号:36页码:8913-8918
关键词multidecadally resolved polarity oscillations geomagnetic excursion abrupt reversal transition asymmetrical interhemispheric polarity drifts stalagmite U-Th dating
ISSN号0027-8424
DOI10.1073/pnas.1720404115
英文摘要Polarity reversals of the geomagnetic field have occurred through billions of years of Earth history and were first revealed in the early 20th century. Almost a century later, details of transitional field behavior during geomagnetic reversals and excursions remain poorly known. Here, we present a multidecadally resolved geomagnetic excursion record from a radioisotopically dated Chinese stalagmite at 107-91 thousand years before present with age precision of several decades. The duration of geomagnetic directional oscillations ranged from several centuries at 106-103 thousand years before present to millennia at 98-92 thousand years before present, with one abrupt reversal transition occurring in one to two centuries when the field was weakest. These features indicate prolonged geodynamo instability. Repeated asymmetrical interhemispheric polarity drifts associated with weak dipole fields likely originated in Earth's deep interior. If such rapid polarity changes occurred in future, they could severely affect satellites and human society.
WOS关键词INSTABILITY TIME-SCALE ; MAGNETIC-FIELD ; HIGH-PRECISION ; REVERSALS ; GEODYNAMO ; RECORD ; IDENTIFICATION ; SPELEOTHEM ; MICROSCOPY ; EVOLUTION
资助项目Science Vanguard Research Program of the Ministry of Science and Technology (MOST)[106-2628-M-002-013] ; National Taiwan University[105R7625] ; Higher Education Sprout Project of the Ministry of Education, Taiwan, Republic of China[107L901001] ; Southern University of Science and Technology[Y01316111] ; MOST[104-2745-8-231-001] ; National Natural Science Foundation of China (NSFC)[41372189] ; National Natural Science Foundation of China (NSFC)[41672170] ; NSFC[41374073] ; NSFC[41430962] ; National Synchrotron Radiation Research Center, Taiwan, Republic of China[NSRRC-2015-2-059-2]
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000443555000046
出版者NATL ACAD SCIENCES
资助机构Science Vanguard Research Program of the Ministry of Science and Technology (MOST) ; National Taiwan University ; Higher Education Sprout Project of the Ministry of Education, Taiwan, Republic of China ; Southern University of Science and Technology ; MOST ; National Natural Science Foundation of China (NSFC) ; NSFC ; National Synchrotron Radiation Research Center, Taiwan, Republic of China ; Science Vanguard Research Program of the Ministry of Science and Technology (MOST) ; National Taiwan University ; Higher Education Sprout Project of the Ministry of Education, Taiwan, Republic of China ; Southern University of Science and Technology ; MOST ; National Natural Science Foundation of China (NSFC) ; NSFC ; National Synchrotron Radiation Research Center, Taiwan, Republic of China ; Science Vanguard Research Program of the Ministry of Science and Technology (MOST) ; National Taiwan University ; Higher Education Sprout Project of the Ministry of Education, Taiwan, Republic of China ; Southern University of Science and Technology ; MOST ; National Natural Science Foundation of China (NSFC) ; NSFC ; National Synchrotron Radiation Research Center, Taiwan, Republic of China ; Science Vanguard Research Program of the Ministry of Science and Technology (MOST) ; National Taiwan University ; Higher Education Sprout Project of the Ministry of Education, Taiwan, Republic of China ; Southern University of Science and Technology ; MOST ; National Natural Science Foundation of China (NSFC) ; NSFC ; National Synchrotron Radiation Research Center, Taiwan, Republic of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/88461]  
专题中国科学院地质与地球物理研究所
通讯作者Chou, Yu-Min; Shen, Chuan-Chou
作者单位1.Natl Taiwan Univ, High Precis Mass Spectrometry & Environm Change L, Dept Geosci, Taipei 10617, Taiwan
2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
3.Fujian Normal Univ, Coll Geog Sci, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350117, Fujian, Peoples R China
4.Qingdao Natl Oceanog Lab Sci & Technol, Lab Marine Geol, Qingdao 266237, Peoples R China
5.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China
6.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China
7.Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan
8.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
9.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
10.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Chou, Yu-Min,Jiang, Xiuyang,Liu, Qingsong,et al. Multidecadally resolved polarity oscillations during a geomagnetic excursion[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(36):8913-8918.
APA Chou, Yu-Min.,Jiang, Xiuyang.,Liu, Qingsong.,Hu, Hsun-Ming.,Wu, Chung-Che.,...&Shen, Chuan-Chou.(2018).Multidecadally resolved polarity oscillations during a geomagnetic excursion.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(36),8913-8918.
MLA Chou, Yu-Min,et al."Multidecadally resolved polarity oscillations during a geomagnetic excursion".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.36(2018):8913-8918.

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来源：地质与地球物理研究所

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