I’m not a huge fan of the idea of seeding the atmosphere with salt water, that salt has to come down eventually.
That’s how clouds are naturally seeded anyway, with salt. Rain drops form (condense) around tiny airborne matter, like salt or pollution. Every rain drop is formed this way; drops can’t actually condense without something to nucleate on. What they form around comes down with the drop. We wouldn’t be trying to leave the salt up there. The purpose of the salt is to cause more drops to condense, i.e. more clouds to form.
That’s how clouds are naturally seeded anyway, with salt. Rain drops form (condense) around tiny airborne matter, like salt or pollution. Every rain drop is formed this way; drops can’t actually condense without something to nucleate on. What they form around comes down with the drop. We wouldn’t be trying to leave the salt up there. The purpose of the salt is to cause more drops to condense, i.e. more clouds to form.
I’m concerned too much more salt may lead to salting of land, but I may be worried over nothing.
I also don’t fully trust our ability to predict negative outcomes if it’s profitable to ignore them.
You would hope that it would be diluted by each raindrop that brings it back and its distribution over a wide area, but hope isn’t much to go on.