This comes as a surprise actually although what was modeled was a massive build out that was meant to change things. I do not think that this will actually hold up and it is certainly no reason to not proceed some day with test operations and plausibly a serious farm aimed at blocking severe hurricanes.
My own thoughts on all this was to target dead zones and to prevent hurricanes. Bringing up nutrients will create huge fisheries that are always welcome. If it can done in conjunction with a local gyre, all the better. This was done in the North Pacific and a hugely boosted fishery was observed.
In fact this method is superior to dumping mineral in the ocean. The nutrients will already be bio available.
Atmospheric consequences of disruption of the ocean thermocline, Lester Kwiatkowski et al. 2015 Environ. Res. Lett. 10 034016
Ocean pipes could remove carbon dioxide
Geoengineering: no need for dedicated research
Solar geoengineering coalitions have an incentive to exclude – with VIDEO
About the author
Kate Ravilious is a contributing editor toenvironmentalresearchweb.