Satellite data goes back to 1979. Other sources for a longer time line https://notrickszone.com/2020/08/13/extensively-referenced-study-of-past-scientists-global-temperature-estimates-suggests-no-change-in-100-years/
Satellite data goes back to 1979.
Other sources for a longer time line
https://notrickszone.com/2020/08/13/extensively-referenced-study-of-past-scientists-global-temperature-estimates-suggests-no-change-in-100-years/
(post is archived)