Abstract
The problem of subsidence within the atmosphere has received comparatively little attention in synoptic studies embodying aerological material. Only the most general statements are usually made in regard to this little‐understood though important process always occurring within selected portions of the atmosphere. Several difficulties immediately associate themselves with a rigorous treatment of the phenomenon as observed.Chief among these is the small number of aerological soundings obtainable within one and the same subsiding air‐mass. Since subsidence is generally associated with anticyclones whose periphery is marked by a frontal boundary‐surface having a small slope (especially in southern United States), soundings made some distance from the center of the anticyclone can often penetrate but a thin layer of the underlying airmass before entering a different current aloft. Such soundings yield information regarding only the least conservative portions of the air‐mass being studied.
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