milibars has gone now its hectopascal
Dec 13, 2011 13:25:07 GMT 1
Post by Admin (Annette Andria) on Dec 13, 2011 13:25:07 GMT 1
you might have noticed this change of name
Hectopascal (symbol hPa) is a SI unit, the international system of units now recommended for all scientific purposes. SI units have now replaced c.g.s. units and Imperial units.
However, conversion is easy. 1000 hPa are equal to 1000 mbar, which is equal to 750 mm of mercury in a barometric column, which is 0.987 of the average atmospheric pressure, which on global average is 1013 millibars or hectopascals.
While hPa is used in meteorology most weatherforecasts quote atmospheric pressure in millibar. Why, confused? It might just sound a little nicer.
www.weatheronline.co.uk/reports/wxfacts/Millibar-and-hectopascal.htm
Hectopascal (symbol hPa) is a SI unit, the international system of units now recommended for all scientific purposes. SI units have now replaced c.g.s. units and Imperial units.
However, conversion is easy. 1000 hPa are equal to 1000 mbar, which is equal to 750 mm of mercury in a barometric column, which is 0.987 of the average atmospheric pressure, which on global average is 1013 millibars or hectopascals.
While hPa is used in meteorology most weatherforecasts quote atmospheric pressure in millibar. Why, confused? It might just sound a little nicer.
www.weatheronline.co.uk/reports/wxfacts/Millibar-and-hectopascal.htm