Development of an improved geomagnetic reference field of Antarctica

• Published in: Annals of Geophysics
• Main Authors: De Santis, A., Chiappini, M., Torta, J. M., von Frese, R. R. B.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Istituto Nazionale di Geofisica e Vulcanologia, INGV 1999
• Subjects: Geomagnetic reference field; spherical cap harmonics; polar regions; 04.05.99. General or miscellaneous; Antarctic; The Antarctic; Antarc*; Antarctica
• Online Access: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3721; https://doi.org/10.4401/ag-3721

The properties of the Earth's core magnetic field and its secular variation are poorly known for the Antarctic. The increasing availability of magnetic observations from airborne and satellite surveys, as well as the existence of several magnetic observatories and repeat stations in this region, offer the promise of greatly improving our understanding of the Antarctic core field. We investigate the possible development of a Laplacian reference model of the core field from these observations using spherical cap harmonic analysis. Possible uses and advantages of this approach relative to the implementations of the standard global reference field are also considered.