millibarhektopascal

The millibarhektopascal is a unit of pressure commonly used in meteorology. It is equivalent to 100 pascals. The millibarhektopascal is derived from the pascal, the SI unit of pressure, and the hecto prefix, which denotes a factor of 100. This unit is also frequently referred to as the hectopascal (hPa). Historically, meteorologists often used the millibar (mb) as a unit of pressure. One millibar is equal to 100 pascals, making it numerically identical to the hectopascal. The transition to the hectopascal in meteorological reports was largely an effort to align with the International System of Units (SI). Therefore, a reading of 1013 millibars is the same as 1013 hectopascals, and also the same as 101300 pascals. Standard atmospheric pressure at sea level is defined as 1013.25 millibars or hectopascals. The millibarhektopascal provides a convenient scale for expressing atmospheric pressure variations encountered in weather systems.