What Happens When the Barometric Pressure Falls?
Barometric pressure, also known as atmospheric pressure, is a term used to describe the measure of the amount of atmospheric weight pressing down upon a certain point on the Earth’s surface. Barometric pressure takes its name from the barometer, which is a device that is used to measure the atmospheric pressure in an area. The amount of atmosphere in place over a certain area differs depending on the elevation of that point, so barometers are calibrated to show readings based on what the barometric pressure would be for that point, if it were at sea level. There are several different types of weather phenomena that are associated with a fall in barometric pressure. One weather system that results in lower barometric pressure is a low pressure trough, which is a long area of low barometric pressure. In a low pressure trough, warm air rises, and cools as it goes higher into the atmosphere. The space left behind as the portions of a warm air mass rise are filled by additional warm air, wh
