CONSTANT PRESSURE CHART A chart of a constant pressure surface in which atmospheric pressure is uniform everywhere at any given moment. Elements may include analyses of height above sea level, wind, temperature, and humidity.
constant pressure chart—A chart of a constant pressure surface; may contain analyses of height, wind, temperature, humidity, and/or other elements.
continental polar air—See polar air.
Constant Pressure Chart
Alternate term for Isobaric Chart; a weather map representing conditions on a surface of equal atmospheric pressure.
Although it usually describes the action of a pressure system on a constant pressure chart, it also means a surface low is increasing in cyclonic circulation and acquiring more energy. The opposite of filling.
Isobaric Chart Same as a constant pressure chart.
Isobaric Process Any thermodynamic change of state of a system that takes a place at constant pressure.
Isobaric Surface A surface along which the atmospheric pressure is everywhere equal.
 See also: Thunder, Ocean, Wind, Stratus, Cyclonic
  
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