![]() |
|
Weather
and |
Monitoring Pressure Changes
Barometers are weather instruments used to measure air pressure and they are significant tools for today’s meteorologists. The amount of pressure is indicated by mercury inside the barometer. The mercury level is pushed up when air pressure is high. Air pressure is regularly recorded as inches of mercury (Hg), indicating how high or low the mercury inside a barometer rises or falls. It is also reported in millibars (mb) on weather maps. Today, scientists often use a more modern technique to measure pressure directly in units called hectopascals (hPa). |