Researchers have improved the uncertain temperature measurements conducted by NASA’s Goddard Institute for Space Studies (GISS) to incredible precision. As reported in Journal of Geophysical Research-Atmospheres, the GISS Surface Temperature (GISTEMP) measurements’ uncertainty has shrunk to just 0.05°C (0.09°F) for data collected in recent decades and to 0.15°C (0.27°F) for measurements taken 140 years ago, when the records began.
The analysis, once again, shows the increase in global temperatures from 1880 to today of about 1.1°C (2°F). It also reestablished 2016 as the hottest year on record, followed by 2017, 2015, and 2018. The 10 hottest years since 1880 have been in the last two decades.
“We’ve made the uncertainty quantification more rigorous, and the conclusion to come out of the study was that we can have confidence in the accuracy of our global temperature series,” lead author Nathan Lenssen, a doctoral student at Columbia University, said in a statement. “We don’t have to restate any conclusions based on this analysis.”