Otley on a market day, looking down Kirkgate with The Chevin in the background Taken by Mark Morton on 23 August 2003 ...
The atmospheric pressure at mean sea level, either directly measured or, most commonly, empirically determined from the observed station pressure.
The pressure value obtained by the theoretical reduction or increase of barometric pressure to sea-level.
Average atmospheric pressure at sea-level. This value is 1013.2 millibars.
The pressure value obtained by the theoretical reduction or increase of barometric pressure to sea-level.
the atmospheric pressure at mean sea level, either directly measured or, most commonly, empirically determined from the observed station pressure .