An effect of atmospheric pressure changes on the time change of gravity observed by a superconducting gravity meter.

概要

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After eliminating the gravimetric tides, linear drift and atmospheric mass attractions from data which were obtained by a superconducting gravity meter installed at Kyoto, Japan, residuals obtained were compared with estimated elastic effects using the atmospheric pressure distribution within an angular distance of 20°and a load Green's function. The residuals were in considerably good agreement with the estimated elastic effects except for some discrepancies of short periods. The observed elastic effects took about a middle value between elastic effects estimated for two extreme cases of the earth whose ocean bottom responded perfectly to the atmospheric pressure and of the earth whose ocean bottom did not respond to the atmospheric pressure at all. This result may indicate the presence of non-zero response of the ocean to the atmospheric pressure, the deviation of structure beneath the observation station from the mean earth's structural model, the influence of change in underground water levels, the truncated errors of integration and so on.
日本測地学会の論文