Author(s): M. Nakawo; R. Frederking
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Keywords: No Keywords
Abstract: One method of thickening an ice sheet is "free flooding": ice is built-up by successive flooding and freezing of seawater layers. The salinity of the built-up ice is of great interest because it plays an important role in establishing mechanical properties. Detailed observations on the salinity of flooded water and built-up ice were carried out during the construction of an ice platform. Ice salinity was generally about 20 ppt which is significantly lower than the salinity of the original seawater (~30 ppt). Almost half of the "lost salts" disappeared during the freezing period of a layer; the remainder were lost during subsequent floodings. Detailed salinity, thin section and dye migration measurements were used to postulate processes of construction of horizontal as well as vertical desalination during the construction of the ice platform.
Year: 1981