New views of the spherical Bouguer gravity anomaly

Details New views of the spherical Bouguer gravity anomaly New views of the spherical Bouguer gravity anomaly

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004geoji.159..460v&link_type=abstract

Geophysical Journal International, Volume 159, Issue 7, pp. 460-472.

Astronomy and Astrophysics

Astronomy

11

Bouguer Correction, Geoid, Gravity Anomaly, Topography

Scientific paper

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.

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