New Antarctic gravity anomaly grid for enhanced geodetic and geophysical studies in Antarctica
Gravity surveying is challenging in Antarctica because of its hostile environment and inaccessibility. Nevertheless, many ground-based, airborne, and shipborne gravity campaigns have been completed by the geophysical and geodetic communities since the 1980s. We present the first modern Antarctic-wide gravity data compilation derived from 13 million data points covering an area of 10 million km2, which corresponds to 73% coverage of the continent. The remove-compute-restore technique was applied for gridding, which facilitated leveling of the different gravity data sets with respect to an Earth gravity model derived from satellite data alone. The resulting free-air and Bouguer gravity anomaly grids of 10 km resolution are publicly available. These grids will enable new high-resolution combined Earth gravity models to be derived and represent a major step forward toward solving the geodetic polar data gap problem. They provide a new tool to investigate continental-scale lithospheric structure and geological evolution of Antarctica.
- Scheinert et al -combined.pdf application/pdf 1.29 MB Download File
Also Published In
- Geophysical Research Letters
More About This Work
- Academic Units
- Lamont-Doherty Earth Observatory
- Published Here
- July 1, 2019
The supporting information document is appended to the end of the text.