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New views of the spherical Bouguer gravity anomaly
KTH, Superseded Departments, Infrastructure.
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2004 (English)In: Geophysical Journal International, ISSN 0956-540X, E-ISSN 1365-246X, Vol. 159, no 2, 460-472 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a number of newconcepts concerning the gravity anomaly. First, it identifies a distinct difference between a surface (2-D) gravity anomaly (the difference between actual gravity on one surface and normal gravity on another surface) and a solid (3-D) gravity anomaly defined in the fundamental gravimetric equation. Second, it introduces the 'no topography' gravity anomaly (which turns out to be the complete spherical Bouguer anomaly) as a means to generate a quantity that is smooth, thus suitable for gridding, and harmonic, thus suitable for downward continuation. It is understood that the possibility of downward continuing a smooth gravity anomaly would simplify the task of computing an accurate geoid. It is also shown that the planar Bouguer anomaly is not harmonic, and thus cannot be downward continued.

Place, publisher, year, edition, pages
2004. Vol. 159, no 2, 460-472 p.
Keyword [en]
Bouguer correction, geoid, gravity anomaly, topography, reduction, errors
National Category
Geophysics Geochemistry
URN: urn:nbn:se:kth:diva-23823DOI: 10.1111/j.1365-246X.2004.02435.xISI: 000224634500004ScopusID: 2-s2.0-8744311395OAI: diva2:342522
QC 20100525 QC 20110915Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-09-15Bibliographically approved

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Sjöberg, Lars Erik
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