Gulf of Maine - Water Salinity, Temperature and Sigma t (density) data from 1912 to 1930

It was acquired from the Canadian Fisheries and Oceans Hydrographic database, which covers an area defined by 35 deg - 80 deg N and 42 deg - 100 deg W, and contains over 500,000 temperature-salinity profiles for the Northwest Atlantic from 1910 to the present.

The data comes from a variety of sources including hydrographic bottles, CTD casts (either up or down casts), spatially and temporally averaged Batfish tows, and expendable, digital or mechanical bathythermographs. Near real-time data in the form of IGOSS Bathy or Tesac messages are also included. Updates are made monthly.