The first pan-Alpine surface-gravity database, a modern compilation that crosses frontiers

0542493 - GFÚ 2022 RIV DE eng J - Journal Article
Zahorec, P. - Papčo, J. - Pašteka, R. - Bielik, M. - Bonvalot, S. - Braitenberg, C. - Ebbing, J. - Gabriel, G. - Gosar, A. - Grand, A. - Götze, H.-J. - Hetényi, G. - Holzrichter, N. - Kissling, E. - Marti, U. - Meurers, B. - Mrlina, Jan - Nogová, E. - Pastorutti, A. - Salaun, C. - Scarponi, M. - Sebera, J. - Seoane, L. - Skiba, P. - Szücs, E. - Varga, M.
The first pan-Alpine surface-gravity database, a modern compilation that crosses frontiers.
Earth System Science Data. Roč. 13, č. 5 (2021), s. 2165-2209. ISSN 1866-3508. E-ISSN 1866-3516
R&D Projects: GA MŠMT(CZ) LM2015079
Institutional support: RVO:67985530
Keywords : field * gradient * network * Alps
OECD category: Volcanology
Impact factor: 11.815, year: 2021
Method of publishing: Open access
https://essd.copernicus.org/articles/13/2165/2021/

The AlpArray Gravity Research Group (AAGRG), as part of the European AlpArray program, focuses on the compilation of a homogeneous surface-based gravity data set across the Alpine area. In 2017 10 European countries in the Alpine realm agreed to contribute with gravity data for a new compilation of the Alpine gravity field in an area spanning from 2 to 23 degrees E and from 41 to 51 degrees N. This compilation relies on existing national gravity databases and, for the Ligurian and the Adriatic seas, on shipborne data of the Service Hydrographique et Oceanographique de la Marine and of the Bureau Gravimetrique International. Furthermore, for the Ivrea zone in the Western Alps, recently acquired data were added to the database. This first pan-Alpine gravity data map is homogeneous regarding input data sets, applied methods and all corrections, as well as reference frames. Here, the AAGRG presents the data set of the recalculated gravity fields on a 4 km x 4 km grid for public release and a 2 km x 2 km grid for special request. The final products also include calculated values for mass and bathymetry corrections of the measured gravity at each grid point, as well as height. This allows users to use later customized densities for their own calculations of mass corrections. Correction densities used are 2670 kgm(-3) for landmasses, 1030 kgm(-3) for water masses above the ellipsoid and 1640 kgm(-3) for those below the ellipsoid and 1000 kgm(-3) for lake water masses. The correction radius was set to the Hayford zone O-2 (167 km). The new Bouguer anomaly is station completed (CBA) and compiled according to the most modern criteria and reference frames (both positioning and gravity), including atmospheric corrections. Special emphasis was put on the gravity effect of the numerous lakes in the study area, which can have an effect of up to 5 mGal for gravity stations located at shorelines with steep slopes, e.g., for the rather deep reservoirs in the Alps.
Permanent Link: http://hdl.handle.net/11104/0319918