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Definition 2024

upwelling ‎(plural upwellings)

An upward movement from a lower source.
- 2009, Diarmaid MacCulloch, A History of Christianity, Penguin 2010, p. 873:
  Rather separate from the abolitionist campaign, although likewise led by anglophone Evangelicals, was a sudden upwelling of commitment to worldwide mission.
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

deep sea water flow to surface

upwelling