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Ocean Phytoplankton, El Niño and La Niña

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This lenticular flip card shows monthly sea surface chlorophyll in the Pacific Ocean as observed during El Niño (December 2015), neutral (December 2013), and La Niña (December 1999) conditions. Due to warmer-than-normal sea surface temperatures, increased stratification, and a decrease in upwelled ocean nutrients, El Niño conditions in 2015 caused the local marine food web to experience loss of its usual food supply.
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