Slide 10 of this series.
Nothing is more telling as to the questionable adjustments than the graph below. This is a product of NOAA.
A whislteblower from NOAA questioned the discipline of NOAA in working with data. Even 300 or so scientists are suing NOAA for essentially improper science.
NEXT: Let's have a look at the adjustments that NASA performs on the GISS dataset.
This section on data fraud offers mulitple cases and angles on the general topic. It is however not exhaustive.
USHCN Monthly Temp Adjustments
The list can expand each week given the claims of AGW and their intent.