"According to the scientists' computer simulations, these volcano-cooled summers would cause sea ice to expand, sending huge glaciers hurtling down the then relatively temperate Greenland coast. As the sea ice reached the North Atlantic, it would have melted, mixing with the regular ocean water.
The problem is that the ice had almost no salt in it, which caused the less salty surface water to stop mixing with the denser water below. This in turn would have wreaked havoc on ocean currents in the Atlantic, with the upshot being that less and less warm water could make its way back to the Arctic. An Ice Age was now on its way."
OK, so we are told climate change right now is sending loads of ice into the sea, what will be different this time?