A misspelling in system name: It's Vuori, not "Vouri". (Louhi, however, is correct.)
Finland's main academic supercomputing center, the IT Center for Science (CSC), has been embiggening its number-crunching and data storage capacity throughout 2012, and is at it again this week with the acquisition of a future "Cascade" supercomputer from Cray. CSC is managed by the Finnish Ministry of Education and Culture, and …
Kajaani is a dying backwater, fast draining of population and young people in particular. Choosing it as the site is surely part of the Finnish government's "regional policy" to prop up the local economy. They need more income earners to pay for the babyboomers' pensions and services there.
Finland is a large country (on the European scale) with a small population (on any scale), which is increasingly concentrated in a handful of towns - mostly the capital.
Dunno why they didn't simply build it in the soon-to-be-almost-vacant Nokia building in Salo...
The Salo Nokia center doesn't have thick enough powerlines to supply a datacenter.
The decision of placing the CSC center to Kajaani isn't regional or purely climate. It's a queston of getting cheap building with thick enough powerlines and cooling. A old papermill is ideal for this. It is a open space with good electric connections, and good connection to a water source, to dump the cooling in summertime. And papermills aren't build next to population centers, but where there's forest, power and water.
Thus expect more datacenters to by build in finland in the middle of nowhere. Not for regional politics, but for the cites infrastructure.
I'd be interested in hearing more about the T-Rex's "hot-water cooling".
There are many things that make sense to build 'out in the sticks'. Land & labor are often dirt cheap, and there's plenty of room to dodge the NIMBY's.