Abstract Measurements of the dielectric constant and of the dielectric loss of Alpine snow with various stages of metamorphism are reported. The measurements covering the frequency range of up to 1GHz have been carried out in the natural snow cover; measurements in the microwave X-band (8 to 12 GHz) were recently made with natural snow samples in the laboratory. The effects of snow porosity, grain size and shape and snow wetness are studied in detail and are compared to model calculations. On the basis of experimental results battery-powered dielectric devices for snow wetness measurements in the field have been developed. As water content and water distribution in the uppermost snow layers are important quantities in remote sensing studies in the decimeter and centimeter wavelength regime, the geometry of the sensors has been designed to allow nearly non-destructive surface and volume measurements of the water content. Measurements of a vertical dielectric profile and of daily variations in the wetness gradient in the natural snow cover are shown.


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    Title :

    Snow dielectric measurements


    Contributors:
    Denoth, A. (author)

    Published in:

    Publication date :

    1989-01-01


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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