The annual Ice Forecast Hydrographic Survey Gulf Of St. Lawrence historic data set is from 1972 to 1995. It was an annual program with missions in the months of November - January covering 35 stations in the Gulf Of St. Lawrence. The purpose was to obtain temperature-salinity measurements in the upper 100 m of water from 35 stations in the Gulf of St. Lawrence for preparation of seasonal ice outlook by the Ice Climatology Branch and later the Ice Forecast Central Office of the Department of Environment Atmospheric Environment Service. The data measured included: profile CTD, dissolved oxygen and nutrient data, oxygen isotope, Ra isotope, sediment cores, satellite transmitting thermistor buoys to monitor the cooling, and doppler current profiler to measure ice motion and currents.
