Detecting dipolarity of the geomagnetic field in the paleomagnetic record.

ABSTRACT: Recovering the geomagnetic field strength in the past is key to understanding deep Earth dynamics and detecting potential geodynamo regimes throughout the history of Earth. To better constrain the predictive power of the paleomagnetic record, we propose an approach based on the analysis of the dependency between geomagnetic field strength and inclination (angle made by the horizontal with the field lines). Based on the outcomes of statistical field models, we show that these two quantities should correlate for a wide range of Earth-like magnetic fields, even with enhanced secular variation, persistent nonzonal components, and severe noise contamination. Focusing on the paleomagnetic record, we show that the correlation is not significant for the Brunhes polarity chron, what we ascribe to i

SUBMITTER: Lhuillier F 

PROVIDER: S-EPMC10288625 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature