The forcing caused by the rapid rise in the levels of greenhouse gases is far out of line with current temperatures. A 10°C higher temperature is more in line with these levels, as illustrated by the image below.
Carbon dioxide levels have been above 400 ppm for years. Methane levels above 1900 ppb were recorded in September 2018. Such high levels are more in line with a 10°C higher temperature, as illustrated by the above graph based on 420,000 years of ice core data from Vostok, Antarctica, research station.
How fast could such a 10°C temperature rise eventuate? The image below gives an idea.
High Arctic Temperatures
Why are Arctic temperatures currently so high for the time of year?
As warmer water enters the Arctic Ocean from the Atlantic and Pacific Oceans, there is no thick sea ice left to consume this heat. Some of this heat will escape from the Arctic Ocean to the atmosphere, as illustrated by above dmi.dk image showing very high temperatures for the time of the year over the Arctic
Original Title: What Does Runaway Warming Look Like?
Full Text of the Original Article: http://arctic-news.blogspot.com/2018/10/what-does-runaway-warming-look-like.html