Upwelling currents lift deep nutrients into sunlit surface waters
Where winds push surface water offshore, colder deep water rises to replace it — carrying nitrate, phosphate, and dissolved iron locked away in the dark.
Phytoplankton bloom in that sudden fertilizer, feeding krill, fish, and seabirds along coasts from Peru to California and the Arabian Sea. The same physics can chill coasts while enriching them.
Upwelling is the ocean’s elevator. It turns deep nutrient vaults into living surface food webs within days.
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