CLEAR AIR TURBULENCE AT THE TROPOPAUSE LEVELS

W. Partl

Peer Reviewed

Abstract:	This paper deals with the phenomenon of clear air turbulence in the levels of and adjacent to the tropopause as flight-observed in the North Atlantic routes. An attempt is made to explain t,he various causes and to differentiate between them. The particular radiation and vertical windshear situation of the tropopause causes turbulence which can be estimated in flight by use of the Temperature-Altimetry diagram Navigation, Vol. 8, No. 1, Spring 1961). Methods for best penetration of these levels by altitude and heading changes are given. Clear air turbulence near the tropopause can exist throughout considerable vertical extent, in the horizontal wind-shear area of a well-defined trough and in the dynamically unstable flow situation at the northeast edge of a ridge.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 9, Number 4
Pages:	288 - 295
Cite this article:	Partl, W., "CLEAR AIR TURBULENCE AT THE TROPOPAUSE LEVELS", NAVIGATION: Journal of The Institute of Navigation, Vol. 9, No. 4, Winter 1962-1963, pp. 288-295.
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