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Smoothing impact of isostatic crustal thickness models on local integral inversion of satellite gravity gradiometry data
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geoinformatik och Geodesi.
2011 (English)In: ACTA GEOPHYSICA, ISSN 1895-6572, Vol. 59, no 5, 891-906 p.Article in journal (Refereed) Published
Abstract [en]

The effects of topographic masses on satellite gradiometric data are large and in order to reduce the magnitude of these effects some compensation mechanisms should be considered. Here we use the isostatic hypotheses of Airy-Heiskanen and the recent Vening Meinesz-Moritz for compensating these effects and to smooth the data prior to their downward continuation to gravity anomaly. The second-order partial derivatives of extended Stokes' formula are used for the continuations over a topographically rough territory like Persia. The inversions are performed and compared based on two schemes of the remove-compute-restore technique and direct downward continuation. Numerical results show that the topographic-isostatic effect based on Vening Meinesz-Mortiz's hypothesis smoothes the data better than that based on Airy-Heiskanen's hypothesis. Also the quality of inversions of the smoothed data by this mechanism is twice better than that of the nonsmoothed ones.

Place, publisher, year, edition, pages
2011. Vol. 59, no 5, 891-906 p.
Keyword [en]
local north-oriented frame, extended Stokes' formula, gravity gradient, regularization, isostatic compensation
National Category
Geophysics Other Chemistry Topics
URN: urn:nbn:se:kth:diva-38140DOI: 10.2478/s11600-011-0017-1ISI: 000293285800005ScopusID: 2-s2.0-79960968742OAI: diva2:436339
QC 20110823Available from: 2011-08-23 Created: 2011-08-22 Last updated: 2011-08-23Bibliographically approved

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Bagherbandi, Mohammad
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