The instrumental temperature record shows global warming of around 0.6 C over the entire 20th century.
Many scientists and others are interested in the temperature record of Earth.
Several temperature records were broken in the Midwest on this day.
He has also published papers on the temperature record of the past 1000 years.
The global temperature record represents an average over the entire surface of the planet.
It was the third day in a row that high temperature records have been broken.
"We haven't seen anything like this in the observed temperature record," he said.
Many locations through the region broke temperature records for November.
Also, before satellites, temperature records were dominated by the land, because that's where people are.
Yes, critics have called the temperature record into question.