Difference between revisions of "Isobar"

From Glossary of Meteorology
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<div class="definition"><div class="short_definition">A line of equal or constant [[pressure]]; an [[isopleth]] of pressure.</div><br/> <div class="paragraph">In meteorology, it most often refers to a line drawn through all points of equal [[atmospheric  pressure]] along a given reference surface, such as a [[constant-height surface]] (notably [[mean sea  level]] on surface charts), an [[isentropic surface]], the vertical plane of a [[synoptic]] cross section, etc.  The pattern of isobars has always been a main feature of surface-chart [[analysis]]. Isobars are usually  drawn at intervals of one [[millibar]] or more, depending on the [[scale]] needed to identify or illustrate  a specific meteorological pattern.</div><br/> </div>
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<div class="definition"><div class="short_definition">A line of equal or constant [[pressure]]; an [[isopleth]] of pressure.</div><br/> <div class="paragraph">In meteorology, it most often refers to a line drawn through all points of equal [[atmospheric pressure|atmospheric  pressure]] along a given reference surface, such as a [[constant-height surface]] (notably [[mean sea level|mean sea  level]] on surface charts), an [[isentropic surface]], the vertical plane of a [[synoptic]] cross section, etc.  The pattern of isobars has always been a main feature of surface-chart [[analysis]]. Isobars are usually  drawn at intervals of one [[millibar]] or more, depending on the [[scale]] needed to identify or illustrate  a specific meteorological pattern.</div><br/> </div>
 
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Latest revision as of 17:15, 25 April 2012



isobar

A line of equal or constant pressure; an isopleth of pressure.

In meteorology, it most often refers to a line drawn through all points of equal atmospheric pressure along a given reference surface, such as a constant-height surface (notably mean sea level on surface charts), an isentropic surface, the vertical plane of a synoptic cross section, etc. The pattern of isobars has always been a main feature of surface-chart analysis. Isobars are usually drawn at intervals of one millibar or more, depending on the scale needed to identify or illustrate a specific meteorological pattern.