Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
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Status: STD 2005/06/07
Code: 31

Concept definition: A widespread body of <AIR> that was established while situated over a <REGION> of the <PLANETARY_SURFACE> of the <EARTH> and that undergoes specific modifications while in transit away from that <REGION>; air mass. An air mass is often approximately homogeneous in its horizontal extent (for example: <<AIR_TEMPERATURE>> and/or moisture distribution) and the vertical inhomogeneities are approximately the same over its horizontal extent.
Reference type: IR
Reference: [GMET, "air mass", 1]
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