Articles | Volume 15, issue 14
Atmos. Chem. Phys., 15, 7859–7875, 2015
https://doi.org/10.5194/acp-15-7859-2015

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

Atmos. Chem. Phys., 15, 7859–7875, 2015
https://doi.org/10.5194/acp-15-7859-2015
Research article
17 Jul 2015
Research article | 17 Jul 2015

Atmospheric nitrogen oxides (NO and NO2) at Dome C, East Antarctica, during the OPALE campaign

M. M. Frey et al.

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Short summary
Surprisingly large concentrations and flux of atmospheric nitrogen oxides were measured at Dome C, East Antarctica. It was found that the surface snow holds a significant reservoir of photochemically produced NOx and is a sink of gas-phase ozone. Main drivers of NOx snow emissions were large snow nitrate concentrations, with contributions of increased UV from decreases in stratospheric ozone. Observed halogen and hydroxyl radical concentrations were too low to explain large NO2:NO ratios.
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