Geopotential Height

The height above sea level of a pressure level. For example, if a station reports that the 500 mb height at its location is 5600 m, it means that the level of the atmosphere over that station at which the atmospheric pressure is 500 mb is 5600 meters above sea level. This is an estimated height based on temperature and pressure data.

Gravity-weighted height of a pressure surface, usually in a model that uses pressure as the vertical coordinate.