upper-air observation


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upper-air observation

[¦əp·ər ¦er ‚äb·zər‚vā·shən]
(meteorology)
A measurement of atmospheric conditions aloft, above the effective range of a surface weather observation. Also known as sounding; upper-air sounding.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

upper-air observation

A measurement of atmospheric conditions aloft, above the effective range of a surface weather observation. Also called sounding and upper-air sounding. This is a general term, but it is usually applied to those observations used in the analysis of upper-air charts (as opposed to measurements of upper-atmospheric quantities primarily for research).
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The quantity of the moving platform upper-air data (i.e., data from ships, aircraft, etc.) is much smaller than that of the regular, station-based upper-air observations. Nevertheless, these data might turn out to be important to improve the quality of future reanalyses, as they often come from oceanic regions that are not covered by any other data source in the historic time.
Another estimate of typical heights reached during historical upper-air observations of different types can be obtained from ascents performed during the German Atlantic expedition of 1925-27, spanning a latitudinal range from 53.5[degrees]N to almost 64[degrees]S, and also digitized in the framework of ERA-CLIM.