Effect of atmospheric pressure on the results of gravity measurement

Abstract

Introduction: The article presents the results of comparing the atmospheric pressure and non-tidal gravity variations in Bishkek (Kyrgyzstan) in a year solar minimum. (2018). If the pressure differences are insufficient, then in a year of solar minimum, when the cosmic disturbances are minimal, the assessment of the pressure influence will be more reliable. Methodology: For data processing we selected measurement intervals with the greatest amplitude of pressure change, with the fewest earthquakes, and with no gravity pulsations. A linear trend associated with a shift of the zero point and the values of the lunar-solar gravity variations were excluded from the initial data. For ease of comparison, the pressure was expressed in conventional units of milligal dimension. Results and Discussion: The effect of pressure with the exception of extreme cases is minimal, and it should be taken into account depending on the specific conditions. It was established that the extremes of atmospheric pressure correspond to the gradient extremes of the lunar-solar gravity variations. The reason for this correlation is difficult to explain at this stage. However, one thing is clear: this is due to the atmosphere deformation caused by the Sun and the Moon.