The weather instruments at Tucson International Airport were moved a decade or so ago,.. factors like airport expansion, shade, mass of pavement, etc... all effect readings. These things are taken into account by weather scientists,.. and may be seen as raw data manipulation by deniers.
If these factors were not taken into account... they could also be seen as flaws in data by the deniers, too...
Poking holes is easy...
Real scientists look at the entire picture, and 99% agree with the methodology...
Manipulation, is not always distortion.
http://www.factcheck.org/2015/02/nothing-false-about-temperature-data/If you get a dyno test on your bike,... it always includes data on ambient temperature and humidity...
Outside factors must be taken into account.
This is why the term "raw data" exists....