HEAT OF FREEZING AND MELTING OF SEA ICE.
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Pagination or Media Count:
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 calgm of ice for a brine of about 150 ooo 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 Schwerdtfegers method, it is found to be of the order of 0.5 calgm of sea ice for an overall ice salinity of 8 ooo 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
- Snow, Ice and Permafrost