bottom gravimeter的意思|示意

'

Bottom gravimeter, one of the most important instruments used in oceanographic sounding, is a scientific instrument used to measure the gravity of the sea floor. It usually consists of a pressure sensor and a pair of accelerometers. By measuring the rates of change in the gravity gradient over distances of up to 1km, it is possible to measure the depth of the ocean floor and obtain the density, porosity and sediments of the sea floor.

The bottom gravimeter is used for a variety of applications, including the determination of the regional variation of the ocean bottom heat flux, the study of deep-sea geology and sedimentology, mapping of the oceanic basement and the measurement of the internal structure of the oceanic crust.

The primary function of a bottom gravimeter is to measure local gravity near the seafloor. The device works by measuring the differences in gravity force between the instrument and the seafloor. By using a data logger, the bottom gravimeter collects data at different depths and records it. The data collected is then analyzed and the gravity level of the seafloor is determined.

Bottom gravimeters are typically used in combination with other oceanographic instruments, such as sonar, seismic profiling and acoustic tomography, to gain a better understanding of the ocean. In particular, they can be used to help identify geological features such as ridges and trenches, as well as oceanographic features such as the thermocline. They are also used to locate specific gravity events that are related to seamounts and provide crucial information about the nature of the seafloor.