I’m not proposing this as an actual solution, it’s just a dumb idea. But if we dug a huge, wide hole at the bottom of the ocean, or maybe widened the Mariana Trench or something, could that extra space make the sea levels drop enough to keep the land from flooding?
Another way is to electrolyze the water into h and o. Some hydrogen will escape the atmosphere and not be recombined. Nonreversible process so gl with that.
That’s… A lot of added gas. Pre-space-loss, it would probably feel something like Jupiter’s atmosphere