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 km**2, 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.

Resolution: 10 km; Coordinate system used in calculation: Polar Stereographic Projection; Ellipsoid: WGS84; Projection center: 90 degree South; True scale: 71 degree South; x_min: -3330 km, x_max: 3330 km; y_min: -3330 km, y_max: 3330 kmSurface heights (ellipsoidal and orthometric, resp.) are taken from Bedmap2 (Fretwell et al., 2013, doi:10.5194/tc-7-375-2013).

Supplement to: Scheinert, Mirko; Ferraccioli, Fausto; Schwabe, Joachim; Bell, Robin E; Studinger, Michael; Damaske, Detlef; Jokat, Wilfried; Aleshkova, Nadezhda D; Jordan, Tom A; Leitchenkov, German L; Blankenship, Donald D; Damiani, Theresa; Young, Duncan A; Cochran, James R; Richter, Thomas (2016): New Antarctic gravity anomaly grid for enhanced geodetic and geophysical studies in Antarctica. Geophysical Research Letters, 43(2), 600-610