Articles | Volume 16, issue 19
Research article
07 Oct 2016
Research article |  | 07 Oct 2016

Air–snow exchange of nitrate: a modelling approach to investigate physicochemical processes in surface snow at Dome C, Antarctica

Josué Bock, Joël Savarino, and Ghislain Picard

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Cited articles

Abbatt, J. P. D.: Interaction of HNO3 with water–ice surfaces at temperatures of the free troposphere, Geophys. Res. Lett., 24, 1479–1482,, 1997.
Abbatt, J. P. D.: Interactions of atmospheric trace gases with ice surfaces: adsorption and reaction, Chem. Rev., 103, 4783–4800,, 2003.
Abbatt, J. P. D., Bartels-Rausch, T., Ullerstam, M., and Ye, T. J.: Uptake of acetone, ethanol and benzene to snow and ice: effects of surface area and temperature, Environ. Res. Lett., 3, 045008,, 2008.
Arimoto, R., Zeng, T., Davis, D., Wang, Y., Khaing, H., Nesbit, C., and Huey, G.: Concentrations and sources of aerosol ions and trace elements during ANTCI-2003, Atmos. Environ., 42, 2864–2876,, 2008.
Arora, O. P., Cziczo, D. J., Morgan, A. M., Abbatt, J. P. D., and Niedziela, R. F.: Uptake of nitric acid by sub-micron-sized ice particles, Geophys. Res. Lett., 26, 3621–3624,, 1999.
Short summary
We develop a physically based parameterisation of the co-condensation process. Our model includes solid-state diffusion within a snow grain. It reproduces with good agreement the nitrate measurement in surface snow. Winter and summer concentrations are driven respectively by thermodynamic equilibrium and co-condensation. Adsorbed nitrate likely accounts for a minor part. This work shows that co-condensation is required to explain the chemical composition of snow undergoing temperature gradient.
Final-revised paper