In warm seas, especially the Mediterranean, evaporation produces quite dense warm waters. As a parcel of water's density changes, the water parcel will sink or rise until it reaches a water depth where other water has the same density. If we know the density distribution of the oceans in three dimensions, we can determine the circulation of the oceans. The result is an intermediate salinity cool water mass that is denser than either of its components. Temperature in the World's oceans A. Sources of heat in the oceans 1.
Most heat comes from solar radiation.
The heat gets into the ocean through absorption by water molecules. B. Heat Budget for the Oceans 1. The global heat budget indicates that most heat to the world's oceans arrives as solar radiation. C. Distribution of temperature 1. The warmest water is in the Tropics where maximum solar heating occurs.