Scheinert, Mirko; Zingerle, Philipp; Schaller, Theresa; Pail, Roland (2024): Antarctic gravity anomaly and height anomaly grids (AntGG2021) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.971238
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
These data sets form a major update and enhancement of a first data publication in 2016 (Scheinert et al. 2016: doi:10.1002/2015GL067439, PANGAEA: doi:10.1594/PANGAEA.848168). Ground-based and airborne gravity data were compiled in the frame of the International Association of Geodesy (IAG) SC2.4f Gravity and Geoid in Antarctica (AntGG). Since 2016 important data have been acquired, primarily applying the method of airborne gravimetry, to close existing data gaps, especially over the south polar region. These data were measured during different projects where a number of institutions underwent close cooperations to fund and to realize specific campaigns, among others, Alfred Wegener Institute (Germany), DTU Space (Denmark), British Antarctic Survey (United Kingdom), Norwegian Polar Institute (Norway), National Geospatial Intelligence Agency (USA), and European Space Agency. Important steps in the set-up and processing compared to the AntGG2016 solution include: increase in grid resolution from 10 to 5 km; usage of a high-resolution background gravity field model (SATOP-1); thorough treatment of the topography; processing adopting the remove-compute-restore method and using a partition-enhanced least-squares collocation (LSC) (Zingerle et al. 2021: doi:10.1007/s00190-021-01540-6). Applying the LSC also gives the advantage to provide more data sets (since they are treated as functionals of the disturbing potential) and an accuracy measure (standard deviation) for the inferred gravity anomalies. Thus, data sets provided include: gravity anomaly (at the surface), gravity disturbance (both at the surface and at constant height of 5,000 m), height anomaly (both at surface and at ellipsoid), second radial derivative of the disturbing potential, Bouguer anomaly, and the standard deviation of LSC for the gravity anomaly.
Keyword(s):
References:
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): Antarctic free-air and complete Bouguer gravity anomaly grid [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.848168
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, https://doi.org/10.1002/2015GL067439
Zingerle, Philipp; Pail, Roland; Scheinert, Mirko; Schaller, Theresa (2019): Evaluation of terrestrial and airborne gravity data over Antarctica – a generic approach. Journal of Geodetic Science, 9(1), 29-40, https://doi.org/10.1515/jogs-2019-0004
Zingerle, Philipp; Pail, Roland; Willberg, M; Scheinert, Mirko (2021): A partition-enhanced least-squares collocation approach (PE-LSC). Journal of Geodesy, 95(8), 94, https://doi.org/10.1007/s00190-021-01540-6
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 365860590: The Gravity Field in Antarctica: Geodetic Modelling and Geophysical Inversion (AntGrav)
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Latitude: -90.000000 * Longitude: 0.000000
Comment:
All data sets come as netCDF files with a grid resolution of 5 km by 5 km, and contain, besides the respective functional, the surface height (ice surface, bedrock topography in ice-free areas) from Bedmap2 (as ellipsoidal heights).
Coordinate reference system (CRS): Antarctic Polar Stereographic, EPSG3031, datum: WGS84
Units: gravity anomaly and standard deviation, gravity disturbance, Bouguer anomaly: mGal = 10e-5 m/s²
height anomaly: m
second derivative of dist. potential: E.U. = 10e-4 1/s² (E.U. = Eötvös Unit)
coordinates (x, y): m
ellipsoidal height: m
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | File content | Content | Scheinert, Mirko | |||
2 | netCDF file | netCDF | Scheinert, Mirko | |||
3 | netCDF file (File Size) | netCDF (Size) | Bytes | Scheinert, Mirko | ||
4 | Documentation file | DOCS | Scheinert, Mirko | netCDF header info extracted with ncdump |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
24 data points
Data
All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.