Oxidant Production over Antarctic Land and its Export (OPALE)
Oxidant Production over Antarctic Land and its Export (OPALE)
Editor(s): T. Bartels-Rausch, J. W. Bottenheim, C. Barbante, and S. Preunkert

The OPALE (Oxidant Production over Antarctica Land and its Export) project aims to quantify, understand, and model the level of oxidants present in the lower atmosphere of Antarctica. The oxidants are very abundant there in relation to the presence of large snow- and ice-covered areas. Previous studies focused on oxidants present in the lower atmosphere at the South Pole and at several coastal sites located in West Antarctica. Based on atmospheric measurements carried out at the Concordia (DC) station located at 3250m elevation on the high Antarctic plateau and at the coastal site of Dumont d’Urville (DDU), the project focuses on oxidants present over the eastern part of the Antarctic continent. The obtained data would be of great interest for the scientific communities working on numerous aspects of the global change (coupling atmosphere–ice–climate, interpretation of deep ice cores mainly drilled in East Antarctica, atmospheric chemistry over snow-covered regions).

Atmospheric measurements carried out at DDU and DC included HOx radicals, chemical species controlling the radical productions (O3, HONO, H2O2, HCHO, NO, and NO2), and an isotopic approach to highlight oxidation mechanisms. The field data obtained during the two field campaigns are used to do the following:

  • examine the levels of oxidants over the high Antarctic plateau and factors controlling their budgets;
  • evaluate the impact of this very oxidizing boundary layer at coastal regions of East Antarctica on the basis of in situ observations and chemistry-transport model simulations.

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01 Jul 2016
Inter-annual variability of surface ozone at coastal (Dumont d'Urville, 2004–2014) and inland (Concordia, 2007–2014) sites in East Antarctica
Michel Legrand, Susanne Preunkert, Joël Savarino, Markus M. Frey, Alexandre Kukui, Detlev Helmig, Bruno Jourdain, Anna E. Jones, Rolf Weller, Neil Brough, and Hubert Gallée
Atmos. Chem. Phys., 16, 8053–8069, https://doi.org/10.5194/acp-16-8053-2016,https://doi.org/10.5194/acp-16-8053-2016, 2016
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03 Mar 2016
Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign
Joël Savarino, William C. Vicars, Michel Legrand, Suzanne Preunkert, Bruno Jourdain, Markus M. Frey, Alexandre Kukui, Nicolas Caillon, and Jaime Gil Roca
Atmos. Chem. Phys., 16, 2659–2673, https://doi.org/10.5194/acp-16-2659-2016,https://doi.org/10.5194/acp-16-2659-2016, 2016
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30 Oct 2015
Air–snow transfer of nitrate on the East Antarctic Plateau – Part 2: An isotopic model for the interpretation of deep ice-core records
J. Erbland, J. Savarino, S. Morin, J. L. France, M. M. Frey, and M. D. King
Atmos. Chem. Phys., 15, 12079–12113, https://doi.org/10.5194/acp-15-12079-2015,https://doi.org/10.5194/acp-15-12079-2015, 2015
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09 Oct 2015
Isotopic effects of nitrate photochemistry in snow: a field study at Dome C, Antarctica
T. A. Berhanu, J. Savarino, J. Erbland, W. C. Vicars, S. Preunkert, J. F. Martins, and M. S. Johnson
Atmos. Chem. Phys., 15, 11243–11256, https://doi.org/10.5194/acp-15-11243-2015,https://doi.org/10.5194/acp-15-11243-2015, 2015
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17 Jul 2015
Atmospheric nitrogen oxides (NO and NO2) at Dome C, East Antarctica, during the OPALE campaign
M. M. Frey, H. K. Roscoe, A. Kukui, J. Savarino, J. L. France, M. D. King, M. Legrand, and S. Preunkert
Atmos. Chem. Phys., 15, 7859–7875, https://doi.org/10.5194/acp-15-7859-2015,https://doi.org/10.5194/acp-15-7859-2015, 2015
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17 Jun 2015
Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer
S. Preunkert, M. Legrand, M. M. Frey, A. Kukui, J. Savarino, H. Gallée, M. King, B. Jourdain, W. Vicars, and D. Helmig
Atmos. Chem. Phys., 15, 6689–6705, https://doi.org/10.5194/acp-15-6689-2015,https://doi.org/10.5194/acp-15-6689-2015, 2015
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08 Jun 2015
Characterization of the boundary layer at Dome C (East Antarctica) during the OPALE summer campaign
H. Gallée, S. Preunkert, S. Argentini, M. M. Frey, C. Genthon, B. Jourdain, I. Pietroni, G. Casasanta, H. Barral, E. Vignon, C. Amory, and M. Legrand
Atmos. Chem. Phys., 15, 6225–6236, https://doi.org/10.5194/acp-15-6225-2015,https://doi.org/10.5194/acp-15-6225-2015, 2015
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08 Jun 2015
A case study of a low-level jet during OPALE
H. Gallée, H. Barral, E. Vignon, and C. Genthon
Atmos. Chem. Phys., 15, 6237–6246, https://doi.org/10.5194/acp-15-6237-2015,https://doi.org/10.5194/acp-15-6237-2015, 2015
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26 Nov 2014
Measurements of OH and RO2 radicals at Dome C, East Antarctica
A. Kukui, M. Legrand, S. Preunkert, M. M. Frey, R. Loisil, J. Gil Roca, B. Jourdain, M. D. King, J. L. France, and G. Ancellet
Atmos. Chem. Phys., 14, 12373–12392, https://doi.org/10.5194/acp-14-12373-2014,https://doi.org/10.5194/acp-14-12373-2014, 2014
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19 Sep 2014
Large mixing ratios of atmospheric nitrous acid (HONO) at Concordia (East Antarctic Plateau) in summer: a strong source from surface snow?
M. Legrand, S. Preunkert, M. Frey, Th. Bartels-Rausch, A. Kukui, M. D. King, J. Savarino, M. Kerbrat, and B. Jourdain
Atmos. Chem. Phys., 14, 9963–9976, https://doi.org/10.5194/acp-14-9963-2014,https://doi.org/10.5194/acp-14-9963-2014, 2014
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