As nouns the difference between upwelling and astroturfing
is that upwelling
is an upward movement from a lower source while astroturfing
is (us) the disguising of an orchestrated campaign as a "grass-roots" event – ie, a spontaneous upwelling of public opinion.
An upward movement from a lower source.
* 2009 , (Diarmaid MacCulloch), A History of Christianity , Penguin 2010, p. 873:
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
- Rather separate from the abolitionist campaign, although likewise led by anglophone Evangelicals, was a sudden upwelling of commitment to worldwide mission.
(US) The disguising of an orchestrated campaign as a "grass-roots" event – i.e., a spontaneous upwelling of public opinion.
* front organization