What does barometer mean?

Barometer is a scientific instrument used by meteorology to measure atmospheric pressure. Pressure trends can predict short-term changes in the weather. In surface weather analysis, there are many methods to measure air pressure to help find the ground trough, high pressure system and frontal angle.

Barometer and barometric altimeter (the most basic and common altimeter) are essentially the same instrument, but their uses are different. ? The purpose of the altimeter is to match the atmospheric pressure with the corresponding altitude, while the barometer remains stationary to measure the subtle pressure changes caused by the weather. The main exception is ships at sea, which can use barometers because their height will not change. Due to the existence of weather system, the plane may need to adjust its altitude when flying between different standard pressure zones.

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The types of barometer are mercury barometer and aneroid barometer. Predictable weather changes, sunny days when the air pressure is high; When the air pressure drops, there will be stormy weather. Every time the mercury column with measurable height rises 1 2m, it will drop by about1mm, so the height of the mountain and the height of the plane in the air can be measured.

Baidu encyclopedia-barometer

Baidu encyclopedia-barometer