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

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-wid...

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Bibliographic Details
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
Description
Summary: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). ...

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