The phrase
"homogenization adjustments" refers to making changes or corrections to a dataset in order to make it consistent or uniform. It is like refining or standardizing the data so that it can be compared or analyzed accurately.
Full definition
We discuss the flaws with NOAA's computer program in more detail in Paper 3, but we can illustrate the consequences simply by looking at
the homogenization adjustments the computer program works out for two example stations:
Those homogenization adjustments now distort our perceptions, and affect our interpretations of climate change.
The homogenization adjustments developed by the National Climatic Data Center to reduce the extent of non-climatic biases in the networks were found to be inadequate, inappropriate and problematic for urbanization bias.