Well we have reached the first break point, the coral reefs have now reached the point of no return. There will be some still around in some shape or form but certainly not in the abundance they once were. This will have the effect decreased if diminishing returns on oceanic food stocks. At least 1/3 of the worlds population depends on the ocean for food

2c, which will hit as the new normal sometime between 2030-2032. And during the run up to that, we will see the ice shelf holding back the thwaites and pine glaciers, aka the doomsday glaciers, collapse. Once the ice shelves have been removed, the glaciers are free to slide into the ocean. With in the first 5 years oceans will rise up to 1 meter globally, but when they really start moving, as the temperature rises and the albedo decreases, we will see an exponential jump in see rise to between 9 and 15 meters globally. The high end will be sometime by the end of the century. But remember, that’s just these two glaciers, there are many more that will go as well. I haven’t even added in the ocean rise from the Greenland glaciers.

By 2050, if things continue the way they are, we will easily hit 3c by then. At which point wet bulb temps will be so bad, whole areas of the earth will be uninhabitable. Desert regions, globally, will be impossible to support human life as well as many of the current indigenous animals.