Figure 3 (d) shows the correlation between ocean & surface air temperatures in the control (natural) simulations only. (skepticalscience.com)
They then considered possible increases in air temperature in the future, and converted these to a permafrost distribution map using their observation - based relationship. (sciencedaily.com)
Each of the three years from 2014 to 2016 broke the global air temperature record, and 2017 will also turn out to be one of the hottest years ever. (sciencedaily.com)