Webberweather53
Meteorologist
It's always interesting that historical data that doesn't support warming is "suspect" or "not reliable" but historical temperature and co2 records are iron clad. Probably means nothing. But it's interesting.
The instruments themselves, the types of platforms they were put on (whether it be ships, balloons, ground, etc.), siting locations, coverage, frequency of reporting, (even the time of the day when measurements were made), and uncertainty in those have changed a lot over time. Historical tempreature data is by no means iron clad, but the level of warming that's occurred is way, way outside the uncertainty ranges considering all of these factors + other random variables. Even in the last several decades, where coverage + reliability of data is good, we are significantly warming without a doubt, no matter what you're using to measure temperature (Radiosondes, satellites, surface stations, ships, buoys, etc.)