noun. The act or an instance of rising up from or as if from a lower source.

noun. A process in which cold, often nutrient-rich waters from the ocean depths rise to the surface.

noun. An upward movement from a lower source.

noun. the oceanographic phenomenon that occurs when strong, usually seasonal, winds push water away from the coast, bringing cold, nutrient-rich deep waters up to the surface

"Every seven years, due to the interference of El Niño currents the cold water upwelling is altered."

black-lacquered  camouflaging  crystallites  depressurization  ejecta  

upwell