Antarctic free-air and complete Bouguer gravity anomaly grid ...

• Main Authors: 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
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: x; y; LONGITUDE; LATITUDE; Height above ellipsoid; Orthometric height; Free-air gravity anomaly; Accuracy; Bouguer anomaly; Antarc*; Antarctic; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.848168; https://doi.pangaea.de/10.1594/PANGAEA.848168

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 ... : 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). ...