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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:02 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Aviation hazards associated with tropopause folding.Conceptual approach proposals
Authors:
Paul BUGEAC (1), Sabina ȘTEFAN(1)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, România
E-mail
paul.bugeac@gmail.com
Keywords:
tropopause folding, jet-stream, aviation hazards
Abstract:
In operational meteorology for aviation, hazards like jet-streams or clear-air turbulence are elements of high impact in flight safety and, due to their random manifestation, are not always well forecasted using numerical weather products. The impact on flight operations of clear-air turbulence is major and can be in the range between light shakings, causing discomfort of the passegers, up to structural damage associated to extreme turbulence. The conceptual approach is essential in forecasting clear-air turbulence events taking into account the fact that turbulence occurence and intensity are not fully understood and the numerical weather products are identifying just the most probable areas and intensity of clear-air turbulence. Clear-air turbulence is most frequently associated to jet streams and upper-level frontal systems. According to this, is extremely important to identify in quasi-real-time conditions the position of these structures. Actually, is difficult to state if tropopause folding generates jet-streams or the jet streams generates tropopause folding. The most accurate identification can be done using water vapor satellite imagery for the upper levels (WV 6.2 µm) or the ozone channel (O3 9.7 µm) by identifying the tropopause folding.In this context, satellite information becomes essential in narrowing the areas of significant clear-air turbulence events manifestation. Therefore, in this study is presented a conceptual approach for identification of potential clear-air turbulence areas related to position of jet-stream core and tropopause folding, using satellite images.
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