Woods Hole Oceanographic Institution

The North Pacific subtropical gyre (NPSG), shown here, is the largest continuous ecosystem on earth, and a critical regulator of global CO2 and biogeochemical balance. According to recent satellite observations, the NPSG is expanding at a rate of 1-4% per year, commensurate with global decrease in (net) primary productivity. Despite declines in nutrient availability, primary production in the NPSG (Chl a color bar) has actually increased in recent decades counter to the global trend. (Google Earth)

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