The sun rises in Pleasant Plains, Illinois. Photograph: Seth Perlman/AP
by Dana Nuccitelli, "Climate Consensus - The 97%," The Guardian, January 16, 2015
This is the latest in a series of warm years, in a series of warm decades. While the ranking of individual years can be affected by chaotic weather patterns, the long-term trends are attributable to drivers of climate change that right now are dominated by human emissions of greenhouse gases
Indeed, if we only use the data of the past 30 y, these show an almost linear trend of 0.017 °C/y, yielding an expected 2.5 new record hot temperatures in the last decade [1 per 4 years].