Antarctic gravity anomaly and height anomaly grids (AntGG2021) ...

• Main Authors: Scheinert, Mirko, Zingerle, Philipp, Schaller, Theresa, Pail, Roland
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Antarctica; Bouguer gravity anomaly; gravity anomaly; height anomaly; regional gravity field; File content; netCDF file; netCDF file File Size; Documentation file; netCDF header info extracted with ncdump; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Alfred Wegener Institute; Antarc*; Antarctic; British Antarctic Survey; Norwegian Polar Institute; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.971238; https://doi.pangaea.de/10.1594/PANGAEA.971238

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; ... : 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: WGS84Units: gravity anomaly and standard deviation, gravity disturbance, Bouguer anomaly: mGal = 10e-5 m/s²height anomaly: msecond derivative of dist. potential: E.U. = 10e-4 1/s² (E.U. = Eötvös Unit)coordinates (x, y): mellipsoidal height: m ...