Articles | Volume 15, issue 11
Atmos. Chem. Phys., 15, 6237–6246, 2015
https://doi.org/10.5194/acp-15-6237-2015

Special issue: Oxidant Production over Antarctic Land and its Export...

Atmos. Chem. Phys., 15, 6237–6246, 2015
https://doi.org/10.5194/acp-15-6237-2015

Research article 08 Jun 2015

Research article | 08 Jun 2015

A case study of a low-level jet during OPALE

H. Gallée, H. Barral, E. Vignon, and C. Genthon H. Gallée et al.
  • CNRS/UJF – Grenoble 1, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), France

Abstract. A case study of a low-level jet (LLJ) during the OPALE (Oxidant Production over Antarctic Land and its Export) summer campaign is presented. It has been observed at Dome C (East Antarctica) and is simulated accurately by the three-dimensional version of the Modèle Atmosphérique Régional (MAR). It is found that this low-level jet is not related to an episode of thermal wind, suggesting that Dome C may be a place where turbulence on flat terrain can be studied.

Short summary
This is the first time that a low-level jet observed above the East Antarctic Plateau is simulated by a regional climate model. This paper illustrates in a 3-D simulation the respective influences of the large-scale pressure gradient force and turbulence on the onset of the low-level jet. As atmospheric turbulence plays a key role in explaining the behaviour of chemical tracers during the OPALE campaign, this paper also increases our confidence in using the outputs of the model for this purpose.
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