Articles | Volume 16, issue 3
https://doi.org/10.5194/tc-16-967-2022
https://doi.org/10.5194/tc-16-967-2022
Research article
 | 
14 Mar 2022
Research article |  | 14 Mar 2022

Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types – estimates over the 100–850 kg m−3 density range

Neige Calonne, Alexis Burr, Armelle Philip, Frédéric Flin, and Christian Geindreau

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Short summary
Modeling gas transport in ice sheets from surface to close-off is key to interpreting climate archives. Estimates of the diffusion coefficient and permeability of snow and firn are required but remain a large source of uncertainty. We present a new dataset of diffusion coefficients and permeability from 20 to 120 m depth at two Antarctic sites. We suggest predictive formulas to estimate both properties over the entire 100–850 kg m3 density range, i.e., anywhere within the ice sheet column.