GISS Data Tampering – Worse Than You Thought

Climatism Comment : This stuff needs to be circulated. Done.

Real Science

The graph below shows GISS US temperatures five year mean. At first glance, it looks like the US is really heating up.

data.giss.nasa.gov/gistemp/graphs_v3/Fig.D.txt

Now compare that to the actual GHCN thermometer data which the graph is based on. They look nothing alike. The 1930s were much hotter.

Index of /pub/data/ghcn/daily/hcn/

The next graph overlays the published GISS temperature (red) on the thermometer data (blue) normalized to 2003. You can see that they have massively cooled the past relative to the present – to create the appearance of non-existent warming.

Next, let’s compare the actual data to what GISS published in 1999, before they started their most serious tampering.

NASA GISS: Science Briefs: Whither U.S. Climate?

The next graph overlays the thermometer data (blue) on the 1999 GISS graph. You can see that there was much less tampering going on at that time.

The next graph is a bonus, which overlays…

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