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File:Chlorophyll concentration off the Galapagos archipelago during El Niño and La Niña.jpg

Summary

Description
English: El Niño and La Niña, large-scale shifts in winds and currents in the equatorial Pacific, have dramatic effects on the ecosystems of the Galapagos. These satellite maps show chlorophyll concentration (which corresponds with the abundance of microscopic ocean plants, called phytoplankton) during El Niño (top) and La Niña (lower). Blue represents low concentrations, while yellow, orange and red indicate high concentrations. Currents that normally fertilize the phytoplankton reverse during El Niño, resulting in barren oceans. These same currents are strengthened by La Niña resulting in an explosion of ocean life.
Date 18 July 2009
Source NASA Earth Observatory
Author GSFC Ocean Colour team and GeoEye.

Images from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS).

Licensing

Public domain This file is in the public domain because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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