geopotential thickness

geopotential thickness

[¦jē·ō·pə′ten·chəl ′thik·nəs]
(geophysics)
The difference in the geopotential height of two constant-pressure surfaces in the atmosphere, proportional to the appropriately defined mean air temperature between the two surfaces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.