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| #REDIRECT [[air parcel]] | | #REDIRECT [[Air parcel]] |
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| {{Term
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| |Display title=air parcel
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| |Definitions={{Definition
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| |Num=1
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| |Meaning=
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| An imaginary volume of air to which may be assigned any or all of the basic dynamic and thermodynamic properties of atmospheric air.<br/> A [[parcel]] is large enough to contain a very great number of molecules, but small enough so that the properties assigned to it are approximately uniform within it and so that its motions with respect to the surrounding [[atmosphere]] do not induce marked compensatory movements. It cannot be given precise numerical definition, but a cubic foot of air might fit well into most contexts where air parcels are discussed, particularly those related to [[static stability]]. Any [[fluid parcel]] may be defined similarly.
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