Online story about PolarTREC teacher Alex Eilers and her expedition to Antarctica. Includes information about sending postcards to the Pink Palace Museum and then having them be returned from Antarctica.
Density currents drive 3D movements within the world’s oceans that dwarf surface currents by volume. Density-driven movements due to temperature/salinity differences keep the world’s oceans well mixed & help to re-distribute heat from tropical areas towards polar areas. Resultant upwelling creates some of the world’s richest ocean ecosystems. Density movements known as turbidity currents are the world’s largest