Off the coast of South Africa, near where the South Atlantic meets the
Southern Indian Ocean, a massive summer phytoplankton bloom colored the
waters with a swirl of turquoise, green and white in late December 2011.
Although this circular bloom has the appearance of a precious antique
gaming marble, it is actually the result of millions of tiny plant-like
organisms (phytoplankton ) which are growing where nutrient-rich waters mix together.
Each spring and summer, lengthening sunshine comes to the southern oceans, providing light to spur the growth of these microscopic plants
. The lengthening light also melts sea ice, which can release
additional nutrients into the sea. Blooms such as this one become a
banquet for krill, fish and other marine species which survive in these cool waters.
The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA’s
Terra satellite captured this true-color image on December 26, 2011 as
it passed over the region.
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