A study of local turbulence and anisotropy during the afternoon and evening transition
with an unmanned aerial system and mesoscale simulation

Lampert, Astrid; Pätzold, Falk; Jiménez, Maria Antonia; Lobitz, Lennart; Martin, Sabrina; Lohmann, Gerald; Canut, Guylaine; Legain, Dominique; Bange, Jens; Martínez-Villagrasa, Dani; Cuxart, Joan

doi:10.5194/acp-16-8009-2016

Articles | Volume 16, issue 12

https://doi.org/10.5194/acp-16-8009-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

The Boundary-Layer Late Afternoon and Sunset Turbulence (BLLAST)...

https://doi.org/10.5194/acp-16-8009-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 12

Research article

|

01 Jul 2016

Research article |

| 01 Jul 2016

A study of local turbulence and anisotropy during the afternoon and evening transition with an unmanned aerial system and mesoscale simulation

Astrid Lampert, Falk Pätzold, Maria Antonia Jiménez, Lennart Lobitz, Sabrina Martin, Gerald Lohmann, Guylaine Canut, Dominique Legain, Jens Bange, Dani Martínez-Villagrasa, and Joan Cuxart

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Feb 2016	57	39	4	100
Mar 2016	64	18	0	82
Apr 2016	13	5	1	19
May 2016	17	12	1	30
Jun 2016	14	9	2	25
Jul 2016	246	26	4	276
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Latest update: 08 Nov 2025

Short summary

For a large field experiment in summer 2011 in southern France (BLLAST campaign), the development of turbulence in the atmosphere was analysed during the afternoon and evening. Besides ground-based remote sensing and in situ observations, turbulence parameters were measured with an unmanned aerial vehicle and analysed by numerical simulation. Turbulence decreased during the afternoon, but increased after sunset due to local wind systems. Turbulent eddies lost symmetry during the transition.