By Paul Homewood

Real Climate have just issued their attempt to disprove my allegations about temperature adjustments in the Arctic.

The only piece of evidence they can offer is this plot of temperatures at Svalbard Airport, which compares GISS temperatures with a composite series developed by Oyvind Nordli.

The graph only begins in 1980, and consequently totally misses the point that the adjustments made at GHCN reduced temperatures from around the 1940’s to the 1960’s.

Temperature records at Svalbard Airport only started in 1977, and there is no other long running on the island, so any long term comparisons cannot be made with GISS.

However, we can check other nearby locations.

Below are the GHCN plots for those stations with long running records going back to pre 1940.

ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v3/products/stnplots/

At three of the five, we see the tell tale cooling of the 1930’s through to 60’s. The other two…