"This warming trend is alarming," said NASA Administrator Bill Nelson.
Climatologists at the NASA Goddard Institute for Space Studies in New York City found that 2007 tied with 1998 as Earth's second warmest year in a century. The eight warmest years in the GISS record have all occurred since 1998, and the 14 warmest years record have all occurred since 1990.
Globally averaged temperatures in 2017 were 0.90 degree Celsius warmer than the 1951 to 1980 mean, according to scientists at NASA's Goddard Institute for Space Studies in New York. That is second only to global temperatures in 2016.