Evaluation of gravitational gradients generated by Earth's crustal structures

Pavel Novák, Robert Tenzer, Mehdi Eshagh, Mohammad Bagherbandi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Spectral formulas for the evaluation of gravitational gradients generated by upper Earth's mass components are presented in the manuscript. The spectral approach allows for numerical evaluation of global gravitational gradient fields that can be used to constrain gravitational gradients either synthesised from global gravitational models or directly measured by the spaceborne gradiometer on board of the GOCE satellite mission. Gravitational gradients generated by static atmospheric, topographic and continental ice masses are evaluated numerically based on available global models of Earth's topography, bathymetry and continental ice sheets. CRUST2.0 data are then applied for the numerical evaluation of gravitational gradients generated by mass density contrasts within soft and hard sediments, upper, middle and lower crust layers. Combined gravitational gradients are compared to disturbing gravitational gradients derived from a global gravitational model and an idealised Earth's model represented by the geocentric homogeneous biaxial ellipsoid GRS80. The methodology could be used for improved modelling of the Earth's inner structure.
Original languageEnglish
Pages (from-to)22-33
Number of pages12
JournalComputers and Geosciences
Volume51
DOIs
Publication statusPublished - 1 Feb 2013
Externally publishedYes

Keywords

  • Earth's gravitational field
  • Earth's inner structure
  • Forward modelling
  • Gravitational gradients
  • Spherical harmonic series

ASJC Scopus subject areas

  • Information Systems
  • Computers in Earth Sciences

Cite this