GEOMAGNETIC-FIELD INTENSITY AND REVERSALS DURING THE PAST 4 MILLION YEARS

被引：335
作者：
VALET, JP
MEYNADIER, L
机构：
[1] Institut de Physique du Globe de Paris, 75252 Paris Cedex 05
来源：
NATURE | 1993年 / 366卷 / 6452期
关键词：
D O I：
10.1038/366234a0
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A long and continuous record of the geomagnetic field intensity shows that intensity variations are dominated by two modes. Major episodes of field regeneration prevail on timescales of a few thousand years immediately after most reversals, whereas stable polarity states are characterized by a slow (approximately 0.5 Myr) relaxation process. Reversals can be seen as the consequence of a progressive degradation of the dipole field.
引用
收藏
页码：234 / 238
页数：5
相关论文
共 39 条
[1]  
BOGUE SW, 1993, EOS, V74, P109
[2]   EVIDENCE FOR A NEW GEOMAGNETIC REVERSAL FROM LAVA FLOWS IN IDAHO - DISCUSSION OF SHORT POLARITY REVERSALS IN THE BRUNHES AND LATE MATUYAMA POLARITY CHRONS [J].
CHAMPION, DE ;
LANPHERE, MA ;
KUNTZ, MA .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1988, 93 (B10) :11667-11680
[3]   GEOGRAPHICAL-DISTRIBUTION OF TRANSITIONAL VGPS - EVIDENCE FOR NON-ZONAL EQUATORIAL SYMMETRY DURING THE MATUYAMA-BRUNHES GEOMAGNETIC REVERSAL [J].
CLEMENT, BM .
EARTH AND PLANETARY SCIENCE LETTERS, 1991, 104 (01) :48-58
[4]   A QUANTITATIVE COMPARISON OF 2 PALEOMAGNETIC RECORDS OF THE COBB MOUNTAIN SUBCHRON FROM NORTH-ATLANTIC DEEP-SEA SEDIMENTS [J].
CLEMENT, BM ;
MARTINSON, DG .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1992, 97 (B2) :1735-1752
[5]   POLARITY TRANSITIONS, EXCURSIONS AND PALEOSECULAR VARIATION OF THE EARTHS MAGNETIC-FIELD [J].
CLEMENT, BM ;
CONSTABLE, CG .
REVIEWS OF GEOPHYSICS, 1991, 29 :433-442
[6]   GEOMAGNETIC PALEOINTENSITIES FROM RADIOCARBON-DATED LAVA FLOWS ON HAWAII AND QUESTION OF PACIFIC NONDIPOLE LOW [J].
COE, RS ;
GROMME, S ;
MANKINEN, EA .
JOURNAL OF GEOPHYSICAL RESEARCH, 1978, 83 (NB4) :1740-1756
[7]   LENGTHS OF GEOMAGNETIC POLARITY INTERVALS [J].
COX, A .
JOURNAL OF GEOPHYSICAL RESEARCH, 1968, 73 (10) :3247-+
[8]   GEOMAGNETIC POLARITY EPOCHS - NUNIVAK ISLAND ALASKA [J].
COX, A ;
DALRYMPL.GB .
EARTH AND PLANETARY SCIENCE LETTERS, 1967, 3 (02) :173-&
[9]  
GALLET Y, 1993, P ODP SCI RESULTS, V130, P547
[10]   PALEOMAGNETIC EXCURSIONS, ABORTED REVERSALS AND TRANSITIONAL FIELDS [J].
HOFFMAN, KA .
NATURE, 1981, 294 (5836) :67-69
1234