DR GENE FELDMAN, NASA GSFC / SCIENCE PHOTO LIBRARY DR GENE FELDMAN, NASA GSFC / SCIENCE PHOTO LIBRARY
False-colour satellite image of the western Atlantic, showing the distribution of phyto- plankton in the surface water. The colours represent varying phytoplankton densities from red (most dense) through yellow and green to blue (least dense). The black areas are land and the grey areas are data gaps. The blue/green boundary shows the meandering path of the Gulf Stream. The Gulf Stream waters are fairly barren compared with the plankton-rich waters of the American continental shelf or slope. The image was produced from data acquired by the Coastal Zone Colour Scanner on NASA's Nimbus-7 research satellite.
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