James Hansen: "Eventual global warming due to today's GHG forcing alone - after slow feedbacks operate - is about 10°C." 1,100 billion tonnes of human CO2 already in the atmosphere *weighs more than everything on Earth built by humans* and heats this planet to ~6°C. The other GHGs add a further ~4°C. There is no way to get the GHGs including CO2 that weighs more than everything on Earth made by humans out of the air. Even if there was a way, there is no time. Regardless of future emissions, concentrations of GHGs will continue to rise for centuries, with CO2 possibly peaking at double or even triple today's level. This is because of the extreme sensitivity of amplifying feedbacks to the direct warming effect of human GHGs. At today's level of 560ppm CO2-equivalent, the direct GHG warming effect of 1°C eventually causes an additional 9°C of warming by feedbacks. Although it will take centuries and millennia for the Earth to fully adjust humanity's explosion of GHGs, a majority of the remaining ~9°C equilibrium warming can be expected to occur over the next 100 years.

Defies belief. This is the ocean on our agricultural midlatitudes. There's a delay of 3 or 4 months, but the land surface warms more than the sea surface. Worth getting prepped while things are still relatively stable. See my pinned tweet.