An oceanographic process in which wind-driven surface currents push warm surface water away from a coastline, allowing colder, nutrient-rich water from the deep ocean to rise and take its place. The nutrients upwelling delivers to the sunlit surface layer fuel some of the ocean's most productive fisheries, including those off the coasts of Peru and California, and a weakening of upwelling during an El Nino event can collapse those fisheries for a season or more.
Cross-Tradition Connections
Demonstrated By
Seasonal wind driven upwelling brings nutrient rich deep water to the surface of Lake Tanganyika, sustaining the fisheries that shoreline communities depend on.
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