By Paul Homewood
Let’s take a closer look at the GHCN temperature adjustments at Puerto Casado, one of the stations in Paraguay we looked at previously.
In common with the other Paraguayan sites, a large adjustment was made around 1970, which seems to have been in response to a drop in the annual mean from 24.64C in 1970 to 23.57C the year after. (Although there was a bigger increase in temperature the following year).
If this drop of more than a degree had been due to a station move, or other non-climatic factors, you would expect to see a step change in the monthly figures at some point during the year.
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