Articles | Volume 11, issue 6
Geosci. Model Dev., 11, 2393–2418, 2018
https://doi.org/10.5194/gmd-11-2393-2018
Geosci. Model Dev., 11, 2393–2418, 2018
https://doi.org/10.5194/gmd-11-2393-2018

Model description paper 20 Jun 2018

Model description paper | 20 Jun 2018

Numerical experiments on vapor diffusion in polar snow and firn and its impact on isotopes using the multi-layer energy balance model Crocus in SURFEX v8.0

Alexandra Touzeau et al.

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Latest update: 21 Oct 2021
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Short summary
We introduced a new module of water vapor diffusion into the snowpack model Crocus. Vapor transport locally modifies the density of snow layers, possibly influencing compaction. It also affects the original isotopic signature of snow layers. We also introduced water isotopes (𝛿18O) in the model. Over 10 years, the modeled attenuation of isotopic variations due to vapor diffusion is 7–18 % lower than the observations. Thus, other processes are required to explain the total attenuation.