Click Here Observation of magnetic diffusion in the Earth's outer core from Magsat, Ørsted, and CHAMP data

• Published in: Journal of Geophysical Research
• Main Authors: Chulliat, A, Olsen, N
• Other Authors: Institut de Physique du Globe de Paris (IPGP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), National Space Institute Lyngby (DTU Space), Technical University of Denmark Lyngby (DTU)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2010
• Subjects: [SDU]Sciences of the Universe [physics]; Helena Island; St. Helena; St. Helena Island; South Atlantic Ocean
• Online Access: https://hal-insu.archives-ouvertes.fr/insu-01288805; https://hal-insu.archives-ouvertes.fr/insu-01288805/document; https://hal-insu.archives-ouvertes.fr/insu-01288805/file/jgrb6994.pdf; https://doi.org/10.1029/2009JB006994

International audience The frozen flux assumption consists in neglecting magnetic diffusion in the core. It has been widely used to compute core flows from geomagnetic observations. Here we investigate the validity of this assumption over the time interval 1980–2005, using high‐ precision magnetic d...