Ocean fisheries are declining worldwide due to overexploitation. Productivity could be
enhanced and the problem alleviated by pumping nutrient-rich deep ocean water (DOW) to
the surface to feed phytoplankton, the bottom end of a marine food chain, mimicking natural
upwelling which sustains the most productive ocean fishing grounds in the world. Various
pump types and power sources have been proposed for this purpose. The present article
proposes a simple wave-powered pump to demonstrate the concept cost-effectively at …