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Contribution of mass density heterogeneities to the quasigeoid-to-geoid separation

Citace:
TENZER, R., HIRT, C., NOVÁK, P., PITOŇÁK, M., ŠPRLÁK, M. Contribution of mass density heterogeneities to the quasigeoid-to-geoid separation. JOURNAL OF GEODESY, 2015, roč. 90, č. 1, s. 65. ISSN: 0949-7714
Druh: ČLÁNEK
Jazyk publikace: eng
Anglický název: Contribution of mass density heterogeneities to the quasigeoid-to-geoid separation
Rok vydání: 2015
Autoři: Ing. Robert Tenzer Ph.D. , Christian Hirt Ph.D. , Prof. Ing. Pavel Novák Ph.D. , Ing. Martin Pitoňák Ph.D. , Ing. Michal Šprlák Ph.D. ,
Abstrakt CZ: Tento příspěvek diskutuje vliv hustotních anomálií v horních vrstvách zemského pláště na hodnotu korekce geoid-quazigeoid.
Abstrakt EN: The geoid-to-quasigeoid separation is often computed only approximately as a function of the simple planar Bouguer gravity anomaly and the height of the computation point while disregarding the contributions of terrain geometry and variable topographic density as well as mass density heterogeneities distributed below the geoid surface. In this study we demonstrate that these contributions are significant and, therefore, should be taken into consideration when investigating the relation between the normal and orthometric heights particularly in the mountainous, polar and geologically complex regions. These contributions are evaluated by applying the spectral expressions for gravimetric forward modelling and using the EIGEN-6C4 gravity model, the Earth2014 datasets of terrain, ice thickness and inland bathymetry and the CRUST1.0 sediment and (consolidated) crustal density data.
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