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Evaluation of gravitational gradients generated by Earth's crustal structures
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
2013 (English)In: Computers & Geosciences, ISSN 0098-3004, E-ISSN 1873-7803, Vol. 51, 22-33 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2013. Vol. 51, 22-33 p.
Keyword [en]
Earth's gravitational field, Earth's inner structure, Forward modelling, Gravitational gradients, Spherical harmonic series
National Category
Geophysics
Identifiers
URN: urn:nbn:se:kth:diva-118324DOI: 10.1016/j.cageo.2012.08.006ISI: 000315368500004Scopus ID: 2-s2.0-84870228684OAI: oai:DiVA.org:kth-118324DiVA: diva2:605615
Note

QC 20130214

Available from: 2013-02-14 Created: 2013-02-14 Last updated: 2017-12-06Bibliographically approved

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