Sounds as plausible as anything else I’ve read.
Look, all I want to see about global warming, is some consensus among reasonable scientists, and then a presentation of the basis for their conclusions in some logical format we can read, review and understand.
Absent that, it is all hooey. But I am a lot more likely to believe in natural climate changes, even just the one described above, even the one above that we are in a warming end-of-gap period a few thousand years before the next protracted ice age. OK... It’s got to come some time...
As I have written in other climate change threads, one danger of global heating is a flip to global cooling.
One thing that contributes to this is that when too much of the Arctic ice melts, there is no longer freezing of the warm Gulf Stream when it flows to the far north. Currently, when the sea water freezes, it is the fresh water freezing, and the more concentrated and heavier saltier water falls to the bottom of the ocean and gradually flows back to the Equator, where it is warmed and recirculated as the Gulf Stream.
Failure of the formation of heavier saltier water can cause this whole circulation to fail. No more Gulf Stream, no more mild climate in Europe, start of another Ice Age? Think about it.