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Evaluation of gravitational gradients generated by Earth's crustal structures
University of West Bohemia, Plzeň, Czech Republic.
National School of Surveying, Division of Sciences, University of Otago, Dunedin, New Zealand.
Royal Institute of Technology, Stockholm, Sweden.
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, Samhällsbyggnad/GIS-Institutet. (Geodesy)
2013 (engelsk)Inngår i: Computers & Geosciences, ISSN 0098-3004, E-ISSN 1873-7803, Vol. 51, s. 22-33Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2013. Vol. 51, s. 22-33
Emneord [en]
Earth’s innerstructure, Earth’s gravitationalfield, Forward modelling, Gravitational gradients, Spherical harmonicseries
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-14939DOI: 10.1016/j.cageo.2012.08.006ISI: 000315368500004Scopus ID: 2-s2.0-84870228684OAI: oai:DiVA.org:hig-14939DiVA, id: diva2:638048
Tilgjengelig fra: 2013-07-25 Laget: 2013-07-25 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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