I do not know. That is the short answer to your question.
I know there are some environmental groups, as you said earlier, that are observing the effects of climate change and talking about the possibility of islands in the Pacific disappearing, for example. Obviously, this change has repercussions on migrations, particularly for our allies in Australia and New Zealand, which see the direct effects of it on movements of peoples.
That is something worth considering, but I am not personally familiar with these kinds of studies.