I am assuming that you are talking about satellite vs land based and ocean based readings.
That is easily explainable but raises a question we should ask.
Why when we know satellite readings are more accurate do they continue to use land and ocean based readings in their data?
Because the satellite readings are cooler.
Fraud!
That's what I wanted to know, thanks.
So do the surface temperatures (according to CRU numbers) show not only hotter temps, but also a significant rise in temps over 10 or 20 years?
And what trends, over decades, do satellite readings show, if any?