Remember when Anthony Watts blamed global warming on Russian steampipes? Well, he's back with it all over again (archived here). Anthony posted a chart of global temperature anomalies from October 2008 and wrote:
From the “we told you so years ago” department comes this interesting study that might explain the 8 °C red spot in the Russian Arctic that NASA GISS always seems to have: [replaced link with archived version]
The study was about how some cities in Murmansk Oblast were warmer than their surrounds, which was attributed to the Urban Heat Island effect. That's mildly interesting but not unexpected. Thing is, Anthony referred back to his article about Russian steam pipes, and the map he showed above had the hottest areas in quite a different area.
Here is a map showing two of the cities mentioned in the press release, Murmansk and Apatity, which are up near Finland. Click on the map to enlarge it:
The interesting thing is that the larger city, Murmansk (pop. 300,000) showed less UHI effect than the smaller city, Apatity (pop. 59,000).
But the weird thing is how Anthony wants to blame all Arctic warming on UHI effect of a couple of cities.
As I showed last time, the Arctic is warming a lot, and in very sparsely populated areas. Here's a chart from GISS NASA showing the anomalies for last year (Jan to Dec):
And here's one showing just December:
I'm afraid I'm computer-challenged this evening. I'm out of town and only have a dinky tablet, which is slow and has limited capacity. Otherwise I'd give you a more up-to-date picture.
The point, in case anyone drops in from WUWT, is that the people who put together the global mean surface temperature data sets do already allow for UHI effect. Not only that, but some of the areas in the maps above are very sparsely populated. Anthony Watts is grasping at straws, or burning his mitts grasping Russian steampipes.