The oceans are really, really, unbelievably massive. A molecule of water at the bottom of the Pacific takes a few thousand years to ride the currents from one side to the other and then the coastal upwelling to the surface.
We're only really acidifying the very top layer, unfortunately that's where a huge fraction of the stuff that matters is.
Artificial upwelling is a somewhat promising geo-engineering tech to reduce acidification and increase primary production (and thereby carbon capture). The idea is to somehow bring deep sea water up to the surface. Early attempts used long tubes with one way valves that were lifted up and down by wave energy. New more promising techniques use wave energy to compress air, pump the air down deep and then bubble it (and the surrounding water) up from a grid of pipes.
We're only really acidifying the very top layer, unfortunately that's where a huge fraction of the stuff that matters is.
Artificial upwelling is a somewhat promising geo-engineering tech to reduce acidification and increase primary production (and thereby carbon capture). The idea is to somehow bring deep sea water up to the surface. Early attempts used long tubes with one way valves that were lifted up and down by wave energy. New more promising techniques use wave energy to compress air, pump the air down deep and then bubble it (and the surrounding water) up from a grid of pipes.