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The dielectric behaviour of snow: A study versus liquid water contentSnow is treated as a heterogeneous dielectric material consisting of ice, air, and water. The greater difference in the high frequency relative permittivity of dry snow and water allows to determine the liquid water content by measurements of the relative permittivity of snow. A plate condenser with a volume of about 1000 cv cm was used to measure the average liquid water content in a snow volume. Calibration was carried out using a freezing calorimeter. In order to measure the liquid water content in thin snow layers, a comb-shaped condenser was developed, which is the two dimensional analogon of the plate condenser. With this moisture meter the liquid water content was measured in layers of a few millimeters in thickness, whereby the effective depth of measurement is given by the penetration depth of electric field lines which is controlled by the spacing of the strip lines. Results of field measurements with both moisture meters, the plate condenser and the comb-shaped condenser, are given.
Document ID
19810010989
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ambach, W.
(Innsbruck Univ.)
Denoth, A.
(Innsbruck Univ.)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Publication Information
Publication: NASA. Goddard Space Flight Center Microwave Remote Sensing of Snowpack Properties
Subject Category
Earth Resources And Remote Sensing
Accession Number
81N19516
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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