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The overturning circulation of the Pacific Ocean "flipped" during the last ice age, altering the placement of ancient waters rich in carbon dioxide, according to Earth system scientists at the University of California, Irvine.

California institute of technologyUnited statesUnited kingdomFrance generalLaura thomsonmarPatrick rafterPacific oceanSanta barbaraJohn southonRafter croul hallEllen druffelGermany kiel universityScotland university of stUniversity of californiaOregon state universityNational science foundation