Even the Russians even have it wrong. They claim all of the data should have been used. However, the urban data should have been what was thrown out.
Here is the curious thing about Russia and weather data collection. I read this several years ago. The Russians had a tremendous network of weather collectors out there....literally thousands of them. They kept fine and very dedicated records for the past eighty-odd years....and even going back into the Czar era...they had a decent collection mechanism. When the Soviet Union started to fall apart in the 1990s...this massive number of sites started to decrease.
But they had all this raw data....from vast rural areas of Russia....dating back to the 1930s. So you would think this would be a tremendous thing to treasure and hold onto...because if global warming is really happening...those sites would show examples. And the neat thing is that they were mostly unaffected by air conditioning, asphalt roads, and massive concrete buildings (the failures of the American weather collection system).
The global warming crowd really doesn’t like to mess with this Russian database. It apparently has flaws in showing global warming taking place. Which would beg a question or two...shouldn’t they all count?