Monitoring the optical turbulence in the surface layer at Dome C, Antarctica, with sonic anemometers

The optical turbulence above Dome C in winter is mainly concentrated in the first tens of metres above the ground. Properties of this so-called surface layer (SL) were investigated during the period 2007–2012 by a set of sonic anemometers placed on a 45 m high tower. We present the results of this l...

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Bibliographic Details
Published in:Monthly Notices of the Royal Astronomical Society
Main Authors: Aristidi, E., Vernin, J., Fossat, E., Schmider, F.-X., Travouillon, T., Pouzenc, C., Traullé, O., Genthon, C., Agabi, A., Bondoux, E., Challita, Z., Mékarnia, D., Jeanneaux, F., Bouchez, G.
Format: Text
Language:English
Published: Oxford University Press 2015
Subjects:
Article
Antarc*
Antarctica
Online Access:http://mnras.oxfordjournals.org/cgi/content/short/454/4/4304
https://doi.org/10.1093/mnras/stv2273
Description
Summary:The optical turbulence above Dome C in winter is mainly concentrated in the first tens of metres above the ground. Properties of this so-called surface layer (SL) were investigated during the period 2007–2012 by a set of sonic anemometers placed on a 45 m high tower. We present the results of this long-term monitoring of the refractive index structure constant <f>$C_n^2$</f> within the SL, and confirm its thickness of 35 m. We give statistics of the contribution of the SL to the seeing and coherence time. We also investigate properties of large-scale structure functions of the temperature and show evidence of a second inertial zone at kilometric spatial scales.

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