WGM2012 ...

• Main Authors: Sylvain, Bonvalot, Anne, Briais, Mickael, Kuhn, Aurelie, Peyrefitte, Nicole, Vales, Richard, Biancale, Germinal, Gabalda, Guilhem, Moreaux, Franck, Reinquin, Michel, Sarrailh
• Format: Article in Journal/Newspaper
• Language: English
• Published: BGI 2012
• Subjects: Gravity anomaly; Global Model; Bouguer - FreeAir - Isostatic - Distrubance; Ice Shelves
• Online Access: https://dx.doi.org/10.18168/23; https://doi.org/10.18168/bgi.23

WGM2012 is the first release of a high resolution grids and maps of the Earth’s gravity anomalies (Bouguer, isostatic and surface free-air), computed at global scale in spherical geometry. It has been realized by the Bureau Gravimétrique International (BGI) in the frame of collaborations with international organizations such as Commission for the Geological Map of the World (CGMW), UNESCO, International Association of Geodesy (IAG), International Union of Geodesy and Geophysics (IUGG), International Union of Geological Sciences (IUGS) and with various scientific institutions. WGM2012 gravity anomalies are derived from the available Earth global gravity models EGM2008 and DTU10 and include 1’x1′ resolution terrain corrections derived from ETOPO1 model that consider the contribution of most surface masses (atmosphere, land, oceans, inland seas, lakes, ice caps and ice shelves). These products have been computed by means of a spherical harmonic approach using theoretical developments carried out to achieve ...