Rezwan wrote: Back to the practicalities: It’s all about timing. If that freshwater falls into the ocean and shuts off the current, well, they say that it takes 2 years without snow melting to form a glacier, and only 10 to launch an ice age. So, from the time Greenland spills into the sea, we have 2-10 years.
I am not convinced that this ever happened. A careful examination of pilots’ “rutters”, et cetera seems in order here and I haven’t heard anything about these guys having done any such thing. When did the weather fend off the Spanish Armada for the English? Why did the Spaniards, then among the greatest of sailors, have so much trouble sailing around England? Yep, the Gulf Stream.
The armada? What is a pilot’s rutter? Which guys?
But yes, I just lumped two things together here. One is the thing about if you have weather conditions which result in the lack of snow melting, it only takes 2 years of the snow on a mountain not melting to start a glacier. Then the thing can grow, and in 10 years without melting, you’ve got an ice age.
The thing about greenland is just that a sudden influx of cold freshwater into the saltwater current could switch it off. With the current in chaos, it stops heating Europe, and hey presto, 2-10 years you’ve got another iceage there.
Again, that’s a theory out there. I don’t know, but I’ve been told 🙂