Stairway to Heaven - Climategate

I've taken data from NASA for temperature station State College Pennsylvania and compared the raw data vs. the adjusted data.

I then charted the resulting adjustment data (see below)

Notice anything strange about this adjustment data ?

There is absolutely no scientific reason for adjustments like this.  UHI adjustments would GROW not shrink over time.  Station moves would cause a steady adjustment from the move point onward.

I think I see the trick here.  They are REDUCING temperature values but because they are adjusting the old data down the most and not touching the most recent data is a tricky way to embed a fake "hockey stick".

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