The thoroughness of today's conclusion are interesting.
As it happens, there are only about 5 data gathering agencies that work on the global climate.
Between these agencies they disagree on a couple items:
1. They do not agree on what the global climate is.
2. They do not agree on what the rate of change has been since the late 70's.
3. They do not agree on what the global climate was in the late 70's when the exercise began for the satellite based data.
4. They all start with raw data that is then adjusted according to procedures that change over time.
5. NASA changes its procedures and resulting adjusted data relatively often from conclusions that it doesn't like to conclusions that it does like.
There is clear evidence that shows that Otsi the ice man was covered by an advancing glacier about 5000 years. It receded about 10 years ago to reveal his remains.
The Glaciers in Glacier National Park are receding to reveal ground that they have covered for 7000 years.
What do both of these news items from opposite sides of the globe reveal? You may have guessed it by now. We are warming to a point from which we cooled thousands of years ago.
The current warming is not unprecedented, is not catastrophic and has happened before at a lower CO2 concentration than today.
What do the thorough conclusions you rely on from the IPCC say about these FACTS?
https://en.wikipedia.org/wiki/Ötzi