Transformation process observations of polar firn to ice

Chester C. Langway, Hitoshi Shoji, Atau Mitani, Henrik B. Clausen
1993 Annals of Glaciology  
The transformation of snow to ice under compressive stress is a very slow process unless meltwater is present. A qualitative measure of permeability variation with depth was continuously determined for various shallow-ice cores from the dry-snow zones in both Greenland and Antarctica to investigate this transformation process. Results of the study provide insight into snow densification mechanisms and generally characterize the pore close-off phenomena. Measurements show that bulk densities may
more » ... bulk densities may be expressed as a function of overburden; pore close-off takes place when the overburden is approximately 3.0–4.5 bar.
doi:10.1017/s0260305500011502 fatcat:h66wxcew2rdgvfe5jozougmmwa