Accession Number : AD0640151

Title :   HEAT OF FREEZING AND MELTING OF SEA ICE.

Descriptive Note : Research rept.,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Anderson,Duwayne

Report Date : JUL 1966

Pagination or Media Count : 22

Abstract : Computations are presented which show that the latent heat of freezing ice in equilibrium with sea water is less than that associated with freezing pure water at 0C. The difference is due primarily to a temperature effect that is opposed to some extent by the effect of dissolved substances in the brine. The difference probably amounts to about 7 cal/gm of ice for a brine of about 150 o/oo slinity, freezing at -8C. When the effect of this difference in the total heat required to raise the temperature and melt sea ice is computed by Schwerdtfeger's method, it is found to be of the order of 0.5 cal/gm of sea ice for an overall ice salinity of 8 o/oo and an initial temperature of -8C. The differences are small but significant and until true values are established, published values of heats of freezing and melting and specific heats of sea ice should be used with discretion. (Author)

Descriptors :   (*SEA WATER, FREEZING), (*ICE, THERMAL PROPERTIES), MELTING, SALINITY, TRANSITION TEMPERATURE, SPECIFIC HEAT

Subject Categories : Snow, Ice and Permafrost
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE