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Thin crusts in snow with high density contribute to firn stratigraphy and can have significant impact on firn ventilation as well as on remotely inferred properties like accumulation rate or surface mass balance. From snow profiles measured by means of microfocus X-ray computer tomography we created a unique dataset showing the spatial distribution of crusts in snow on the East Antarctic Plateau as well as in northern Greenland including a measure for their local variability. With this method, we are able to find also weak and oblique crusts, to count their frequency of occurrence and to measure the high-resolution density.
The centre ARPAV (Agenzia Regionale per la Prevenzione e Protezione Ambientale del Veneto, Italia) is involved in the research national programme in Antarctica. To study the mass and energy exchange processes it is necessary to have knowledge about the surface layers of the snow pack in climatic conditions typical for the eastern Antarctica icecap. The snow and the meteorological data are collected during different Italian expeditions nearby the existing stations Dome C, Middle Point etc. The data will be processed to the required format for an application in the model SNOWPACK. The parameters of the model have to be adapted for an Antarctic environment. Furthermore a bibliographic analysis is accomplished to compile the actual knowledge about snow modelling in Antarctica.
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