The results of measuring relative brine content (Qlm) in the liquid phase of frozen sea water at temperatures between –2°C and –43°C with variable rate and direction of temperature change are presented. Various pulsed and steady-state nuclear magnetic
resonance (NMR) methods are used and the results are compared with data in the literature. Temperature dependences of Qlm in sea water with dry NaCl added are given. Quasi-hysteresis corresponding to the crystallization range of certain sea-water salts, mainly NaCl, which
partially precipitates as the crystalline hydrate NaCl 2H2O at temperatures below –23°C, is detected in the temperature dependence of Qlm. The reasons why Qlm values, under various experimental conditions, differ from data in the literature
are explained. Brine salinity (S) is calculated from the relative intensity of NMR signals of Ql, and agrees well with previously published data over a wide temperature range. It is shown that determining Qlm from base measurements of Ql
in ice does not require information about brine salinity. Empirical equations for calculating brine content at different sea-water temperatures and salinity are given.
The Journal of Glaciology is published six times per year. It accepts submissions from any discipline related to the study of snow and ice. All articles are peer reviewed. The Journal is included in the ISI Science Citation Index.