The Ohio Department of Job and Family Services used wage updating factors from March 2015 to further update the data to a more current time period. The updated data contained in this report are not official Bureau of Statistics data series, nor have they been validated by BLS.
Barometric pressure (also known as atmospheric pressure) is the force exerted by the atmosphere at a given point. It is known as the weight of the air. A barometer measures barometric pressure. Measurement of barometric pressure can be expressed in millibars(mb) or in inches or millimeters of mercury (Hg). Normal pressure at sea level is 1013.3 millibars or 29.92 inches of mercury. Fluctuations in barometric pressure are usually a sign of weather conditions.
By definition, atmospheric or air pressure is the force per unit of area exerted on the Earthâs surface by the weight of the air above the surface. The force exerted by an air mass is created by the molecules that make it up and their size, motion, and number present in the air. 1  These are important factors because they determine the temperature and density of the air and thus its pressure. The number of air molecules above a surface determines air pressure. As the number of molecules increases, they exert more pressure on a surface and the total atmospheric pressure increases. By contrast, if the number of molecules decreases, so too does the air pressure. Today, air pressure is often measured with a mercury or aneroid barometer. A mercury barometer measures the height of a mercury column in a vertical glass tube.