Barometric pressure is also known as air pressure or atmospheric pressure and derives its name from the instrument used to measure it called a Barometer. The International System (SI) unit of pressure is the Pascal (Symbol: Pa) which is defined as one Newton per square meter.
Herein, what are the two types of instruments used to measure air pressure?
If a mercury barometer or an aneroid barometer is set up to take measurements all the time, it is called a barograph (see picture). Nowadays, many weather instruments like the mercury barometer or an aneroid barometer have been replaced by electronic instruments that record atmospheric pressure onto a computer.
What can be measured with a barometer?
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. 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, high pressure systems and frontal boundaries.
What is the unit of measurement for a barometer?
A barometer measures atmospheric pressure in units of measurement called atmospheres or bars. An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit).