Barometric pressure
Barometric Pressure
Barometric pressure (pronunciation: /bærɵˈmɛtrɪk 'prɛʃər/), also known as atmospheric pressure, is the pressure within the atmosphere of the Earth. The term originates from the Greek words "baros" meaning weight, and "metron" meaning measure.
Barometric pressure is measured by an instrument called a barometer, which is used in meteorology to measure atmospheric pressure. It provides a measure of the weight of the column of air that extends from the instrument to the top of the atmosphere.
Measurement
There are two main types of barometer: mercury and aneroid. A mercury barometer uses a column of mercury to measure pressure, while an aneroid barometer uses a small, flexible metal box called an aneroid cell.
The standard unit of measurement for barometric pressure is the millibar (mb), though it is often reported in inches of mercury (inHg) in the United States.
Effects on Health
Changes in barometric pressure can have various effects on the human body. Some people may experience headaches, joint pain, or other discomforts due to changes in barometric pressure, a phenomenon known as weather sensitivity.
Related Terms
- Atmospheric pressure
- Barometer
- Mercury barometer
- Aneroid barometer
- Weather sensitivity
- Millibar
- Inches of mercury
External links
- Medical encyclopedia article on Barometric pressure
- Wikipedia's article - Barometric pressure
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