the.com/upwelling
the ocean burping up its coldest, richest secrets from the deep.
means a process where deep, nutrient-dense cold water rises to replace surface water pushed away by wind.
from from wind driving surface water offshore via the coriolis-influenced ekman transport, forcing colder water below to rise and fill the gap — first rigorously modeled in the early 1900s by oceanographers studying coastal currents.
feedsmost of the world's biggest fisheries
coldest spotsperu and california coasts, oddly fish-rich
driven bywind, not temperature or gravity directly
opposite movedownwelling sinks surface water instead