Thanks to Peter for alerting me to this story. The Washington Post, among others, reports that the earth’s five warmest years, including 2018, have been the past five years.
Five different organisations that track temperatures have all come to this conclusion: 2018 ranked among the five warmest years on record, landing in fourth place. All of them — NOAA ( US National Oceanic and Atmospheric Administration), NASA, Berkeley Earth, the United Kingdom’s Hadley Centre and the Japan Meteorological Agency — crunched the numbers using different methods, but they each arrived at the same answer. Confidence in this ranking is, thus, very high.
The past five years have each now ranked among the five warmest on record. According to NASA, 18 of the 19 warmest years have occurred since 2000. The newspaper notes that “the warming of the planet is unambiguous and irrefutable”.
The five research institutions mentioned earlier analyse land and ocean temperatures from all over the planet. While they use different techniques for processing the data, the resulting trends hardly differ. All of them show roughly the same, unmistakable warming signal.