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Parameters Measured

Mean Sea-Level Pressure

Mean Sea-Level Pressure is measured in millibars.

Mean sea-level pressure is the force per unit area (pressure) exerted by the atmosphere as a consequence of gravitational attraction exerted upon the "column" of air lying directly above a specific point that has been corrected to a standard reference level (in this case the average sea level). This is the pressure normally shown on televised weather forecasts and newpapers and removes the local effects of altitude on the pressure reading. These values are expressed in millibars. The millibar is a metric unit of pressure commonly used in aviation and meteorology. One millibar is equal to 100 Newtons/meter2 (100 pascals).