Towards a better understanding of the Earth´s interior and geophysical exploration research
NOVÁK, P., SEBERA, J., VALKO, M., ŠPRLÁK, M., MARTINEC, Z., SNEEUW, N., ROTH, M., VERMEERSEN, B., VAN DER WAL, W., BAUR, O., TSOULIS, D. Towards a better understanding of the Earth´s interior and geophysical exploration research. Plzeň : Evropská kosmická agentura (ESA), 2013. 239 s.
|Anglický název:||Towards a better understanding of the Earth´s interior and geophysical exploration research|
|Název zdroje:||Evropská kosmická agentura (ESA)|
|Autoři:||Prof. Ing. Pavel Novák Ph.D. , Ing. Josef Sebera PhD. , Ing. Miloš Valko Ph.D. , Ing. Michal Šprlák Ph.D. , prof. Zdeněk Martinec , prof. Nico Sneeuw , Matthias Roth , prof. Bert Vermeersen , Wouter van der Wal Ph.D. , Oliver Baur Ph.D. , prof. Dimitrios Tsoulis|
|Abstrakt EN:||The GOCE-GDC project was a part of the Support To Science Element (STSE) Theme 2 "Heterogeneous gravity data combination for Earth interior and geophysical exploration research" aiming to reinforce geophysical applications of GOCE gravitational gradients. Within the project, several data products based on gravitational gradients observed by the GOCE gradiometer and provided by ESA were prepared for two geophysical applications. The data products include combined GRACE/GOCE gravitational gradients along GOCE orbits, their values reduced to a mean orbital radius and gravitational gradients at the mean orbital radius interpolated to equiangular coordinate grids. Additionally gridded gravitational gradients were continued down to a sphere approximating the Earth?s surface and combined with high-frequency gradients derived from independent ground gravity and altimetry data. These data products were applied for regional geophysical studies improving local crustal models over two study areas: the mid-oceanic Reykjanes Ridge south-west of Iceland and the sediment Congo Basin in Africa. Main scientific outcomes of the project include: (i) successful downward continuation of satellite gravitational gradients along the 250 km elevation without deteriorating their relative accuracy, (ii) improved regional mantle modelling over the mid-oceanic Reykjanes Ridge based on gravitational gradients, (iii) refined regional modelling of sediment thickness over the Congo Basin with the help of gravitational gradients, and (iv) sensitivity analysis of gravitational gradients to spatial distribution of gravitating anomalous masses. GOCE gravitational gradients and their derivatives proved to be useful information for constraining regional geophysical modelling.|