J
Jean-Pierre Valet
Researcher at Institut de Physique du Globe de Paris
Publications - 126
Citations - 6361
Jean-Pierre Valet is an academic researcher from Institut de Physique du Globe de Paris. The author has contributed to research in topics: Earth's magnetic field & Geomagnetic reversal. The author has an hindex of 40, co-authored 121 publications receiving 6031 citations. Previous affiliations of Jean-Pierre Valet include Scripps Institution of Oceanography & Centre national de la recherche scientifique.
Papers
More filters
Journal ArticleDOI
Global changes in intensity of the Earth's magnetic field during the past 800kyr
TL;DR: In this article, the authors present the integration of 33 records of relative palaeointensity into a composite curve spanning the past 800 kyr and find that the intensity of the Earth's dipole field has experienced large-amplitude variations over this time period with pronounced intensity minima coinciding with known excursions in field direction, reflecting the emergence of non-dipole components.
Journal ArticleDOI
Geomagnetic dipole strength and reversal rate over the past two million years
TL;DR: It is shown that, at least during this period, the time-averaged field was higher during periods without reversals but the amplitude of the short-term oscillations remained the same, and few intervals of very low intensity are expected during periods with a strong average dipole moment, whereas more excursions and reversals areexpected during periods of weak field intensity.
Journal ArticleDOI
Geomagnetic field intensity and reversals during the past four million years
TL;DR: 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 (∼0.5 Myr) relaxation process as mentioned in this paper.
Journal ArticleDOI
Time variations in geomagnetic intensity
TL;DR: A significant step has been achieved by combining intensity records derived from archeological materials and from lava flows in order to extract the global field changes over the past 12 kyr.
Journal ArticleDOI
Paleointensity of the geomagnetic field during the last 80,000 years
Emmanuel Tric,Jean-Pierre Valet,Piotr Tucholka,Martine Paterne,Laurent Labeyrie,François Guichard,Lisa Tauxe,Michel Fontugne +7 more
TL;DR: In this article, high-resolution records of the relative paleointensity of the geomagnetic field have been obtained from five marine cores and three duplicate records were used to estimate the regional coherency of the data within a single area (Tyrrhrenian Sea) while two others document the field variations in the eastern Mediterranean and the southern Indian Ocean.