Why do you massively tamper with the temperature data, and turn a cooling trend into a warming trend?
You can’t use the raw surface data. It is a mess, affected by station moves, TOBS, different types of thermometers, missing data, etc. It needs large adjustments to be meaningful
Sounds bad – why not just use modern satellite data instead? It has much better coverage.
Satellite data has problems, and needs to be adjusted. The surface data is our most reliable data source.