Salty Seas

Salty Seas

 

One of the factors affecting the flow of the ocean’s waters is is salinity - the amount of salt it carries. NASA’s Aquarius spacecraft, launched in 2011, was built to measure the salinity by looking at the amount of microwave radiation the sea emits. This is a function both of salinity and temperature. This image shows global sea surface salinity for September 2014. The colours depict salt content from dark blue (lowest, 30g salt per kg water) through cyan, green and yellow to red (highest, 40g salt per kg water). High salt concentrations are seen in many tropical areas, but in the Indian Ocean and Asia low salinity is caused by extensive outflows of fresh river water.

Image © NASA Goddard Space Flight Center Scientific Visualization Studio

 

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