Bouguer anomaly below sea level.

概要

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Gravity value observed below sea level is transformed into gravity (g') in the reduction sphere by filling free space between underwater station and sea level (datum surface) with rock material and by removing rock material from outer area of reduction sphere through terrain correction and spherical Bouguer correction. Normal gravity field (r') below sea level is calculated through free air reduction and subtraction of spherical shell between underwater station and sea level. Since gravity anomaly is defined as "g'-rit is regarded as the value at the station below sea level rather than at the sea surface.
日本測地学会の論文