Earth’s surface temperatures have continued to raise, with 2018 being recorded as the fourth hottest year on record since 1880, according to a new joint report released by NASA and the National Oceanic and Atmospheric Administration (NOAA).
Global temperatures in 2018 were 0.83c warmer than the 1951 to 1980 mean. Globally, 2018's temperatures rank behind those of 2016, 2017 and 2015. The past five years are, collectively, the warmest years in the modern record.
“2018 is yet again an extremely warm year on top of a long-term global warming trend,” said GISS Director Gavin Schmidt.
Since the 1880s, the average global surface temperature has risen about one degree. This warming has been driven in large part by increased emissions into the atmosphere of carbon dioxide and other greenhouse gases caused by human activities, according to Schmidt.
The impacts of long-term global warming are already being felt — in coastal flooding, heat waves, intense precipitation and ecosystem change,” said Schmidt.
NASA’s temperature analyses incorporate surface temperature measurements from 6,300 weather stations, ship- and buoy-based observations of sea surface temperatures, and temperature measurements from Antarctic research stations.