6A Amazon River 



Charles S. Yentsch 



Bigelow Laboratory of Ocean Sciences 

 West Boothbay Harbor, Maine 



During the early studies of primary production, the distinguished 

 marine biologist Einer Steeman Nielsen demonstrated a correlation 

 between ocean color (as measured by Forel standards) and photosynthetic 

 carbon fixation. He observed that green waters were most productive, blue 

 waters less so. However, a major deviation from this correlation occurs in 

 the region of the Amazon River outfall. 



