New views of the spherical Bouguer gravity anomaly

P. Vaníček, Robert Tenzer, L. E. Sjöberg, Z. Martinec, W. E. Featherstone

Research output: Journal article publicationJournal articleAcademic researchpeer-review

66 Citations (Scopus)

Abstract

This paper presents a number of new concepts 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.
Original languageEnglish
Pages (from-to)460-472
Number of pages13
JournalGeophysical Journal International
Volume159
Issue number2
DOIs
Publication statusPublished - 1 Nov 2004
Externally publishedYes

Keywords

  • Bouguer correction
  • Geoid
  • Gravity anomaly
  • Topography

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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