I looked at the link at ZeroHedge. It doesn’t go to a journal. It goes to a .pdf on a website. And what do we find? A piece credited to three people notorious for being professional climate science deniers.
In an unusually amateurish move, the paper’s authors attach a little petition in which various non-scientists sign that they “agree with this report.”
The gist of their claim is that adjustments to the GHCN data by the various research teams always strengthen the warming trend.
Why would that be?
Basically, it’s down to access to previously unavailable datasets, the most important being data on Arctic temperatures from Russia. Without that data, temperature change in the Arctic must be inferred from data from nearby stations (GISS) or omitted from the dataset altogether (CRU.) But the availability of more Arctic historical data makes the overall record more accurate.
The Arctic was already known to be warming faster than the rest of the world. Integrating more Arctic data into the other datasets shows that past average global temperatures were cooler and therefore the warming trend is stronger.
Other adjustments to datasets are thoroughly explained on the websites of the research teams that construct the datasets.
To sum up: The .pdf which you indirectly linked is just a propaganda piece that will be dismissed by any informed person who reads it.