. We derive a lithospheric magnetic field model up to equivalent spherical harmonic degree 1000 over southern Africa. We rely on a joint inversion of satellite, near-surface, and ground magnetic field data. The input data set consists of magnetic field vector measurements from the CHAMP satellite, across-track magnetic field differences from the Swarm mission, the World Digital Magnetic Anomaly Map, and magnetic field measurements from repeat stations and three local INTERMAGNET observatories. For the inversion scheme, we use the revised spherical cap harmonic analysis (R-SCHA), a regional analysis technique able to deal with magnetic field measurements obtained at different altitudes. The model is carefully assessed and displayed at different altitudes and its spectral content is compared to high-resolution global lithospheric field models. By comparing the shape of its spectrum to a statistical power spectrum of Earth's lithospheric magnetic field, we infer the mean magnetic thickness and the mean magnetization over southern Africa.

background

/pdf/a-high-resolution-lithospheric-magnetic-field-model-over-35xtdm2exm.pdf

Earth's Magnetic Field: Understanding Geomagnetic Sources from the Earth's Interior and its Environment

A high-resolution lithospheric magnetic field model over southern Africa based on a joint inversion of CHAMP, Swarm, WDMAM, and ground magnetic field data

Earth's Magnetic Field: Understanding Geomagnetic Sources from the Earth's Interior and its Environment

Citations

A high-resolution lithospheric magnetic field model over southern Africa based on a joint inversion of CHAMP, Swarm, WDMAM, and ground magnetic field data

Related Papers (5)

A conceptual model of core dynamics and the earth's magnetic field.

Theory of the magnetic field of the earth.

Geomagnetic field, global pattern

The earth's magnetic field

2 - The Earth’s Magnetic Field