Boundary layer (Meteorology)

Atmosphere, Lower
Atmospheric boundary layer
Friction layer (Meteorology)
Ground layer (Meteorology)
Lower atmosphere
nne Planetary boundary layer
Surface boundary layer
Surface layer (Meteorology)

McGraw-Hill dict. sci. tech. (boundary layer [METEOROL] The lower portion of the atmosphere, extending to a height of approximately 1.2 miles (2 km); atmospheric boundary layer, see surface boundary layer; surface boundary layer [METEOROL] That thin layer of air adjacent to the earth's surface, extending up to the so-called anemometer level (the base of the Ekman layer), also known as atmospheric boundary layer, friction layer, ground layer, surface layer)
Oklahoma Climatological Survey WWW home page, Apr. 14, 2000: Glossary (Boundary layer - in general, a layer of air adjacent to a bounding surface. Specifically, the term most often refers to the planetary boundary layer, which is the layer within which the effects of friction are significant. For the earth, this layer is considered to be roughly the lowest one or two kilometers of the atmosphere. It is within this layer that temperatures are most strongly affected by daytime solar heating and nighttime radiational cooling, and winds are affected by friction with the earth's surface. The effects of friction die out gradually with height, so the "top" of this layer cannot be defined exactly.)
Weather glossary, via weather.com WWW site, Apr. 14, 2000 (Boundary layer. The lowest layer of the earth's atmosphere, usually up to 3,300 feet, or one kilometer, from the earth's surface, where the wind is influenced by the friction of the earth's surface and the objects on it. Related terms: surface boundary layer and friction layer)
Academic Press dict. of sci. and tech., via WWW, Apr. 14, 2000 (planetary boundary layer (Meteorology). The atmospheric layer below the free atmosphere that extends from the earth's surface to the geostrophic wind level; this includes the surface boundary layer and the Ekman layer.)
Uotila, J. Marine meteorological radiosoundings in the northern Baltic Sea from R/V Aranda in 1994-95, 1997: introd. (atmospheric boundary layer (ABL))