METEREOLOGICAL STATION

BAROMETER

The barometric pressure is a measure of how much force is exerted by the air on the Earth, or how dense the air is. The barometric pressure is measured in millimeters of mercury (mm Hg) and changes depending on altitude. Pressure at sea-level is 760 mm Hg where there is a greater volume of air over the land. Because we are at an altitude of 2,650 meters above sea level here in Bogotá, the pressure is around 560 mm Hg. The barometer changes with changes in weather, but usually within a range of 15 mm Hg. A rising barometer usually indicates better weather while a falling barometer indicates foul weather approaching.