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The Decline of Lake Kariba
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Published February 12, 2016
Drought has struck a huge reservoir on the border Zambia and Zimbabwe, reducing the hydro power supply from Kariba dam .
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New Seafloor Map Helps Scientists Find New Features
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Published January 13, 2016
The recent discovery of the Mammerickx Microplate was made possible by new satellite-derived maps of the ocean floor.
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La Nina in progress
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Published September 19, 2010
Acquired September 6, 2010, this map shows cooling in the central Pacific Ocean consistent with La Niña conditions.
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Adios El Nino, Hello La Nina?
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Published June 24, 2010
A strip of cold water hugging the equator in the eastern tropical Pacific Ocean in mid-June may foreshadow a transition from El Niño to La Niña conditions
La Nina Strengthens in Autumn 2007
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Published November 10, 2007
Continuing a pattern that had been building for nine months, La Niña strengthened in the fall of 2007.
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Satellites Detect Deep-Ocean Whirlpools
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Published March 23, 2006
Submerged in the Atlantic Ocean off the coast of Spain and Portugal are giant, salty whirlpools of warm water. These deep-water whirlpools are part of the ocean’s circulatory system, and they help drive the ocean currents that moderate Earth’s climate. Warm water ordinarily sits at the ocean’s surface, but the warm water flowing out of the Mediterranean Sea is so salty (and therefore dense) that when it enters the Atlantic Ocean at the Strait of Gibraltar, it sinks to depths of more than 1,000 meters (one-half mile) along the continental shelf. This underwater river then separates into clockwise-flowing eddies that may continue to spin westward for more than two years, often coalescing with other eddies to form giant, salty whirlpools that may stretch for hundreds of miles. Because the eddies originate from the Mediterranean Sea, scientists call them “Meddies.”
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