Details
| Original language | English |
|---|---|
| Pages (from-to) | 2165-2209 |
| Number of pages | 45 |
| Journal | Earth system science data |
| Volume | 13 |
| Issue number | 5 |
| Publication status | Published - 19 May 2021 |
Abstract
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 E and from 41 to 51 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 Oc anographique de la Marine and of the Bureau Gravim trique 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_4 km grid for public release and a 2 km_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 O2 (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. The results of an error statistic based on cross validations and/or interpolation residuals are provided for the entire database. As an example, the interpolation residuals of the Austrian data set range between about 8 and C8 mGal and the cross-validation residuals between -14 and C10 mGal; standard deviations are well below 1 mGal. The accuracy of the newly compiled gravity database is close to-5 mGal for most areas. A first interpretation of the new map shows that the resolution of the gravity anomalies is suited for applications ranging from intra-crustal- to crustal-scale modeling to interdisciplinary studies on the regional and continental scales, as well as applications as joint inversion with other data sets. The data are published with the DOI https://doi.org/10.5880/fidgeo.2020.045 (Zahorec et al., 2021) via GFZ Data Services.
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In: Earth system science data, Vol. 13, No. 5, 19.05.2021, p. 2165-2209.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The first pan-Alpine surface-gravity database, a modern compilation that crosses frontiers
AU - Zahorec, Pavol
AU - Papčo, Juraj
AU - Pašteka, Roman
AU - Bielik, Miroslav
AU - Bonvalot, Sylvain
AU - Braitenberg, Carla
AU - Ebbing, Jörg
AU - Gabriel, Gerald
AU - Gosar, Andrej
AU - Grand, Adam
AU - Götze, Hans Jürgen
AU - Hetényi, György
AU - Holzrichter, Nils
AU - Kissling, Edi
AU - Marti, Urs
AU - Meurers, Bruno
AU - Mrlina, Jan
AU - Nogová, Ema
AU - Pastorutti, Alberto
AU - Salaun, Corinne
AU - Scarponi, Matteo
AU - Sebera, Josef
AU - Seoane, Lucia
AU - Skiba, Peter
AU - Szucs, Eszter
AU - Varga, Matej
PY - 2021/5/19
Y1 - 2021/5/19
N2 - 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 E and from 41 to 51 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 Oc anographique de la Marine and of the Bureau Gravim trique 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_4 km grid for public release and a 2 km_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 O2 (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. The results of an error statistic based on cross validations and/or interpolation residuals are provided for the entire database. As an example, the interpolation residuals of the Austrian data set range between about 8 and C8 mGal and the cross-validation residuals between -14 and C10 mGal; standard deviations are well below 1 mGal. The accuracy of the newly compiled gravity database is close to-5 mGal for most areas. A first interpretation of the new map shows that the resolution of the gravity anomalies is suited for applications ranging from intra-crustal- to crustal-scale modeling to interdisciplinary studies on the regional and continental scales, as well as applications as joint inversion with other data sets. The data are published with the DOI https://doi.org/10.5880/fidgeo.2020.045 (Zahorec et al., 2021) via GFZ Data Services.
AB - 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 E and from 41 to 51 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 Oc anographique de la Marine and of the Bureau Gravim trique 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_4 km grid for public release and a 2 km_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 O2 (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. The results of an error statistic based on cross validations and/or interpolation residuals are provided for the entire database. As an example, the interpolation residuals of the Austrian data set range between about 8 and C8 mGal and the cross-validation residuals between -14 and C10 mGal; standard deviations are well below 1 mGal. The accuracy of the newly compiled gravity database is close to-5 mGal for most areas. A first interpretation of the new map shows that the resolution of the gravity anomalies is suited for applications ranging from intra-crustal- to crustal-scale modeling to interdisciplinary studies on the regional and continental scales, as well as applications as joint inversion with other data sets. The data are published with the DOI https://doi.org/10.5880/fidgeo.2020.045 (Zahorec et al., 2021) via GFZ Data Services.
UR - http://www.scopus.com/inward/record.url?scp=85106750890&partnerID=8YFLogxK
U2 - 10.5194/essd-13-2165-2021
DO - 10.5194/essd-13-2165-2021
M3 - Article
AN - SCOPUS:85106750890
VL - 13
SP - 2165
EP - 2209
JO - Earth system science data
JF - Earth system science data
SN - 1866-3508
IS - 5
ER -