Unit of atmospheric pressure named in honor of Blaise Pascal (1632-1662), whose experiments greatly increased knowledge of the atmosphere. A pascal is the force of one newton acting on a surface area of one square meter. It is the unit of pressure designated by the International System.
100,000 Pa = 1000 mb = 1 bar. See atmospheric pressure, millibar.
Source: NASA (http://earthobservatory.nasa.gov/Glossary)