How Is Barometric Pressure Measured and Why? - HowStuffWorks
2024年2月27日 · Barometric pressure is a measurement of the air pressure in Earth's atmosphere. For this reason, it is also known as atmospheric pressure. The pressure is created by fluid gas molecules in the air, and it extends in all directions.
Atmospheric pressure - Wikipedia
Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa), which is equivalent to 1,013.25 millibars, [1] 760 mm Hg, 29.9212 inches Hg, or 14.696 psi. [2]
What does it mean when a barometer is rising or falling?
The barometric pressure is a measure of how much force the air around you is applying against your body. A change in barometric pressure can trigger a migraine, for example. Who invented the barometer? The barometer was first invented in 1643 by Evangelista Torricelli to …
Barometer - Wikipedia
A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries.
How to Understand Barometric Pressure Readings - Sciencing
2023年3月29日 · How to Understand Barometric Pressure Readings. Barometric pressure (also called atmospheric pressure) is the measure of air pressure in a given area. Air pressure is the weight of air pressing down on a specific area, and it is …
The Basics of Barometric Pressure: Understanding the Weather …
2023年12月5日 · Barometric pressure is the measure of the weight of the air above us in the Earth's atmosphere. It represents the force exerted by the air molecules in the atmosphere on a unit area of the Earth's surface.
Barometric Definition & Meaning - Merriam-Webster
1. : an instrument for determining the pressure of the atmosphere and hence for assisting in forecasting weather and for determining altitude (see altitude sense 1a) 2. : something that indicates fluctuations (as in public opinion) housing sales …
Barometric pressure Definition & Meaning - Merriam-Webster
The meaning of BAROMETRIC PRESSURE is the pressure of the atmosphere usually expressed in terms of the height of a column of mercury.
Barometer | Definition, Types, Units, & Facts | Britannica
3 天之前 · A barometer is a device used to measure atmospheric pressure. Because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure altitude. There are two main types of barometers: mercury and aneroid. Learn more about barometers in this article.
Barometer - Education | National Geographic Society
2023年10月24日 · A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure.