Whole lotta ‘estimating’ going on. And it has increased dramatically. Why? Infilling from non-rural stations into rural raises the ‘adjusted’ temperature according to Steve Goddard.
Hardly a day goes by without expert comments like this appearing in comment sections, like this one from yesterday.
All reported warming in the US over the past 25 years is due to infilling fabricated data.
USHCN has 1,218 stations in their database. Prior to 1990, they typically recorded temperatures at about 97% of these stations. But for some reason, USHCN has been reporting monthly temperatures at a smaller and smaller percentage of stations since 1990, and now about 30% of monthly temperatures are completely missing.
What NCDC does in those cases, is to fabricate temperatures for the missing stations. The graph below shows the percentage of stations which have fabricated data, which is increasing in a hockey stick.
The station data being fabricated is dominantly from rural stations, which are being infilled with surrounding urban stations
Fake temperatures are marked with an “E” in their final database, as seen below in the 2008-2011 January-June…
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