The pattern is common when La Nina -- the cooler than normal waters in the Eastern Equatorial Pacific -- influences upper air patterns across the southern United States.

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Swallowing enough fortified waters, snack bars and breads could edge consumers toward the upper limits for vitamins set by the U.S.' National Institutes of Health, worries Marion L. Neuhouser, a diet researcher at Seattle's Fred Hutchinson Cancer Research Center.

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It is deeply concerned about who controls the Nile waters, and does not want the creation of a new state on the upper Nile.

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TC4 project will generate new data on the icy cirrus clouds that are formed in the upper atmosphere by heat-driven, or convective, storm systems that coalesce over warm waters in the tropics.

ECONOMIST: Climatology