Mountain-Wave Turbulence Encounter of the Research Aircraft HALO above Iceland

Strong turbulence was encountered by the German High-Altitude Long-Range Research Aircraft (HALO) at flight level 430 (13.8 km) on 13 October 2016 above Iceland. In this event the turbulence caused altitude changes of the research aircraft of about 50 m within a period of approximately 15 s. Additio...

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Bibliographic Details
Published in:Journal of Applied Meteorology and Climatology
Main Authors: Bramberger, Martina, Dörnbrack, Andreas, Wilms, Henrike, Ewald, Florian, Sharman, Robert D.
Format: Article in Journal/Newspaper
Language:English
Published: American Meteorological Society 2020
Subjects:
Verkehrsmeteorologie
Lidar
Iceland
Online Access:https://elib.dlr.de/134877/
https://elib.dlr.de/134877/1/Bramberger-etal-JAMC-D-19-0079.pdf
https://doi.org/10.1175/JAMC-D-19-0079.1
Description
Summary:Strong turbulence was encountered by the German High-Altitude Long-Range Research Aircraft (HALO) at flight level 430 (13.8 km) on 13 October 2016 above Iceland. In this event the turbulence caused altitude changes of the research aircraft of about 50 m within a period of approximately 15 s. Additionally, the automatic thrust control of the HALO could not control the large gradients in the horizontal wind speed and, consequently, the pilot had to switch off this system. Simultaneously, the French Falcon of Service des Avions Français Instrumentés pour la Recherche en Environnement (SAFIRE), flying 2 km below HALO, also encountered turbulence at almost the same location.

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